docs: rewrite gantt chart to update branches and dates [skip ci]

- Force the `dateFormat` to prevent chart rendering issues.
- Use absolute dates to prevent chart alignment issues caused by
  variations in the number of days in each month.
- Updated chart content from version branch 3.11 to 3.16.
- Add a note stating that the chart is for reference only.

Author: 3gf8jv4dv

docs/ReleaseSchedule.md

@@ -49,23 +49,41 @@ Users can enable the "Preview HMCL releases early" option on the "Settings > Gen
 ```mermaid
 gantt
     title HMCL Version Lifecycle (Example)
-    section 3.9
-        Development Phase: a1, 2025-11-15, 30d
-        Preview Phase: a2, after a1, 16d
+    dateFormat YYYY-MM-DD
+    section 3.11
+        Development Phase: a1, 2026-01-15, 2026-02-15
+        Preview Phase: a2, 2026-02-15, 2026-02-28
         Stable Release: milestone, after a2, 0d
-        Maintenance Phase: a3, after a2, 31d
-    section 3.10
-        Development Phase: b1, after a1, 31d
-        Preview Phase: b2, after b1, 16d
+        Maintenance Phase: a3, 2026-02-28, 2026-03-31
+    section 3.12
+        Development Phase: b1, 2026-02-15, 2026-03-15
+        Preview Phase: b2, 2026-03-15, 2026-03-31
         Stable Release: milestone, after b2, 0d
-        Maintenance Phase: b3, after b2, 31d
-    section 3.11
-        Development Phase: c1, after b1, 31d
-        Preview Phase: c2, after c1, 16d
+        Maintenance Phase: b3, 2026-03-31, 2026-04-30
+    section 3.13
+        Development Phase: c1, 2026-03-15, 2026-04-15
+        Preview Phase: c2, 2026-04-15, 2026-04-30
         Stable Release: milestone, after c2, 0d
-        Maintenance Phase: c3, after c2, 30d
+        Maintenance Phase: c3, 2026-04-30, 2026-05-31
+    section 3.14
+        Development Phase: d1, 2026-03-15, 2026-04-15
+        Preview Phase: d2, 2026-04-15, 2026-04-30
+        Stable Release: milestone, after d2, 0d
+        Maintenance Phase: d3, 2026-04-30, 2026-05-31
+    section 3.15
+        Development Phase: e1, 2026-04-15, 2026-05-15
+        Preview Phase: e2, 2026-05-15, 2026-05-31
+        Stable Release: milestone, after e2, 0d
+        Maintenance Phase: e3, 2026-05-30, 2026-06-30
+    section 3.16
+        Development Phase: f1, 2026-05-15, 2026-06-15
+        Preview Phase: f2, 2026-06-15, 2026-06-30
+        Stable Release: milestone, after f2, 0d
+        Maintenance Phase: f3, 2026-06-30, 2026-07-31
 ```
 
+*Note: This chart is for reference only; actual schedules may vary.*
+
 In general, we release a new version branch every month,
 and each version branch `x.y` has a lifecycle of two and a half months.
 

docs/ReleaseSchedule_zh.md

@@ -43,23 +43,41 @@ HMCL 具有两个主要发布通道：**稳定版通道**和**开发版通道**
 ```mermaid
 gantt
     title HMCL 版本生命周期 (示例)
-    section 3.9
-        开发阶段: a1, 2025-11-15, 30d
-        预览阶段: a2, after a1, 16d
+    dateFormat YYYY-MM-DD
+    section 3.11
+        开发阶段: a1, 2026-01-15, 2026-02-15
+        预览阶段: a2, 2026-02-15, 2026-02-28
         稳定版发布: milestone, after a2, 0d
-        维护阶段: a3, after a2, 31d
-    section 3.10
-        开发阶段: b1, after a1, 31d
-        预览阶段: b2, after b1, 16d
+        维护阶段: a3, 2026-02-28, 2026-03-31
+    section 3.12
+        开发阶段: b1, 2026-02-15, 2026-03-15
+        预览阶段: b2, 2026-03-15, 2026-03-31
         稳定版发布: milestone, after b2, 0d
-        维护阶段: b3, after b2, 31d
-    section 3.11
-        开发阶段: c1, after b1, 31d
-        预览阶段: c2, after c1, 16d
+        维护阶段: b3, 2026-03-31, 2026-04-30
+    section 3.13
+        开发阶段: c1, 2026-03-15, 2026-04-15
+        预览阶段: c2, 2026-04-15, 2026-04-30
         稳定版发布: milestone, after c2, 0d
-        维护阶段: c3, after c2, 30d
+        维护阶段: c3, 2026-04-30, 2026-05-31
+    section 3.14
+        开发阶段: d1, 2026-03-15, 2026-04-15
+        预览阶段: d2, 2026-04-15, 2026-04-30
+        稳定版发布: milestone, after d2, 0d
+        维护阶段: d3, 2026-04-30, 2026-05-31
+    section 3.15
+        开发阶段: e1, 2026-04-15, 2026-05-15
+        预览阶段: e2, 2026-05-15, 2026-05-31
+        稳定版发布: milestone, after e2, 0d
+        维护阶段: e3, 2026-05-30, 2026-06-30
+    section 3.16
+        开发阶段: f1, 2026-05-15, 2026-06-15
+        预览阶段: f2, 2026-06-15, 2026-06-30
+        稳定版发布: milestone, after f2, 0d
+        维护阶段: f3, 2026-06-30, 2026-07-31
 ```
 
+*注：图表仅供参考，日期可能会有变动。*
+
 通常情况下，我们每个月发布一个版本分支，每个版本分支 `x.y` 生命周期为两个半月。
 
 每个版本分支生命周期分为以下阶段:

docs/ReleaseSchedule_zh_Hant.md

@@ -43,23 +43,41 @@ HMCL 具有兩個主要發布管道：**穩定版管道**和**開發版管道**
 ```mermaid
 gantt
     title HMCL 版本生命週期 (範例)
-    section 3.9
-        開發階段: a1, 2025-11-15, 30d
-        預覽階段: a2, after a1, 16d
+    dateFormat YYYY-MM-DD
+    section 3.11
+        開發階段: a1, 2026-01-15, 2026-02-15
+        預覽階段: a2, 2026-02-15, 2026-02-28
         穩定版發布: milestone, after a2, 0d
-        維護階段: a3, after a2, 31d
-    section 3.10
-        開發階段: b1, after a1, 31d
-        預覽階段: b2, after b1, 16d
+        維護階段: a3, 2026-02-28, 2026-03-31
+    section 3.12
+        開發階段: b1, 2026-02-15, 2026-03-15
+        預覽階段: b2, 2026-03-15, 2026-03-31
         穩定版發布: milestone, after b2, 0d
-        維護階段: b3, after b2, 31d
-    section 3.11
-        開發階段: c1, after b1, 31d
-        預覽階段: c2, after c1, 16d
+        維護階段: b3, 2026-03-31, 2026-04-30
+    section 3.13
+        開發階段: c1, 2026-03-15, 2026-04-15
+        預覽階段: c2, 2026-04-15, 2026-04-30
         穩定版發布: milestone, after c2, 0d
-        維護階段: c3, after c2, 30d
+        維護階段: c3, 2026-04-30, 2026-05-31
+    section 3.14
+        開發階段: d1, 2026-03-15, 2026-04-15
+        預覽階段: d2, 2026-04-15, 2026-04-30
+        穩定版發布: milestone, after d2, 0d
+        維護階段: d3, 2026-04-30, 2026-05-31
+    section 3.15
+        開發階段: e1, 2026-04-15, 2026-05-15
+        預覽階段: e2, 2026-05-15, 2026-05-31
+        穩定版發布: milestone, after e2, 0d
+        維護階段: e3, 2026-05-30, 2026-06-30
+    section 3.16
+        開發階段: f1, 2026-05-15, 2026-06-15
+        預覽階段: f2, 2026-06-15, 2026-06-30
+        穩定版發布: milestone, after f2, 0d
+        維護階段: f3, 2026-06-30, 2026-07-31
 ```
 
+*註：圖表僅供參考，日期可能會有變動。*
+
 通常情況下，我們每個月發布一個版本分支，每個版本分支 `x.y` 生命週期為兩個半月。
 
 每個版本分支生命週期分為以下階段: