chore(deps): update actions/github-script action to v9 (#277)

Author: renovate-bot

.github/workflows/periodic-reporter.yaml

@@ -25,7 +25,7 @@ jobs:
       issues: 'write'
 
     steps:
-      - uses: 'actions/github-script@v8'
+      - uses: 'actions/github-script@v9'
         with:
           script: |
             // Label for all issues opened by reporter

.github/workflows/validate_syntax.yaml

@@ -16,7 +16,7 @@ jobs:
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
 
       - name: Get source files
-        uses: actions/github-script@v8
+        uses: actions/github-script@v9
         id: get-files
         with:
           script: |