Update rushstack dependencies (#226)

## Description

Updates `@rushstack/heft` and other `@rushstack/*` packages to their
latest versions across all examples, templates, apps, API, and tools.

## How was this tested?

`rush update` and `rush build` were run to regenerate lock files and
verify the build succeeds with the updated dependencies.

## Type of change
- [ ] Bug fix
- [ ] New feature / enhancement
- [ ] Template change
- [x] Documentation / CI / governance

Author: iclanton

api/spfx-template-api/package.json

@@ -11,8 +11,8 @@
   },
   "dependencies": {
     "@microsoft/spfx-heft-plugins": "1.22.2",
-    "@rushstack/node-core-library": "~5.20.3",
-    "@rushstack/terminal": "~0.22.3",
+    "@rushstack/node-core-library": "~5.21.0",
+    "@rushstack/terminal": "~0.22.4",
     "adm-zip": "^0.5.16",
     "cli-table3": "^0.6.5",
     "ejs": "^3.1.10",
@@ -23,7 +23,7 @@
   },
   "devDependencies": {
     "@microsoft/spfx-cli-build-rig": "workspace:*",
-    "@rushstack/heft": "^1.2.7",
+    "@rushstack/heft": "^1.2.9",
     "@types/adm-zip": "^0.5.5",
     "@types/ejs": "^3.1.5",
     "@types/lodash": "^4.17.18",

apps/spfx-cli/package.json

@@ -17,14 +17,14 @@
   },
   "dependencies": {
     "@microsoft/spfx-template-api": "workspace:*",
-    "@rushstack/node-core-library": "~5.20.3",
-    "@rushstack/ts-command-line": "~5.3.3",
-    "@rushstack/terminal": "~0.22.3",
+    "@rushstack/node-core-library": "~5.21.0",
+    "@rushstack/ts-command-line": "~5.3.4",
+    "@rushstack/terminal": "~0.22.4",
     "zod": "^4.1.5"
   },
   "devDependencies": {
     "@microsoft/spfx-cli-build-rig": "workspace:*",
-    "@rushstack/heft": "^1.2.7",
+    "@rushstack/heft": "^1.2.9",
     "eslint": "9.37.0"
   }
 }

common/autoinstallers/plugins/package.json

@@ -3,6 +3,6 @@
   "version": "1.0.0",
   "private": true,
   "dependencies": {
-    "@rushstack/rush-published-versions-json-plugin": "0.1.0"
+    "@rushstack/rush-published-versions-json-plugin": "0.1.2"
   }
 }

common/autoinstallers/plugins/pnpm-lock.yaml

@@ -0,0 +1,10 @@
+{
+  "changes": [
+    {
+      "packageName": "@microsoft/spfx-cli",
+      "comment": "",
+      "type": "none"
+    }
+  ],
+  "packageName": "@microsoft/spfx-cli"
+}

common/changes/@microsoft/spfx-cli/update-rushstack-projects_2026-04-02-21-55.json

@@ -0,0 +1,11 @@
+{
+  "changes": [
+    {
+      "comment": "",
+      "type": "none",
+      "packageName": "@microsoft/spfx-cli"
+    }
+  ],
+  "packageName": "@microsoft/spfx-cli",
+  "email": "iclanton@users.noreply.github.com"
+}

common/changes/@microsoft/spfx-cli/update-rushstack-projects_2026-04-02-22-12.json

@@ -24,7 +24,7 @@
      * instead of the latest version.
      */
     // "some-library": "1.2.3"
-    "@rushstack/heft": "^1.2.7",
+    "@rushstack/heft": "^1.2.9",
     "fast-xml-parser": "^5.3.5"
   },