[pre-commit.ci] pre-commit autoupdate (#39)

<!--pre-commit.ci start-->
updates:
- [github.com/astral-sh/ruff-pre-commit: v0.15.20 →
v0.15.21](astral-sh/ruff-pre-commit@v0.15.20...v0.15.21)
<!--pre-commit.ci end-->

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Xianpeng Shen <xianpeng.shen@gmail.com>

Author: pre-commit-ci[bot]

.pre-commit-config.yaml

@@ -1,3 +1,8 @@
+ci:
+  autofix_prs: true
+  autofix_commit_msg: 'chore: auto fixes from pre-commit.com hooks'
+  autoupdate_commit_ms: 'chore: pre-commit autoupdate'
+
 repos:
   - repo: https://github.com/pre-commit/pre-commit-hooks
     rev: v6.0.0
@@ -8,7 +13,7 @@ repos:
       - id: check-added-large-files
       - id: check-merge-conflict
   - repo: https://github.com/astral-sh/ruff-pre-commit
-    rev: v0.15.20
+    rev: v0.15.21
     hooks:
       - id: ruff-check
       - id: ruff-format