Bump actions/github-script from 8 to 9

Bumps [actions/github-script](https://github.com/actions/github-script) from 8 to 9.
- [Release notes](https://github.com/actions/github-script/releases)
- [Commits](actions/github-script@v8...v9)

---
updated-dependencies:
- dependency-name: actions/github-script
  dependency-version: '9'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/backport_reminder.yml

@@ -14,7 +14,7 @@ jobs:
       issues: write
 
     steps:
-      - uses: actions/github-script@v8
+      - uses: actions/github-script@v9
         with:
           script: |
             const labelName = 'defer backport';

.github/workflows/label-base-on-title.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check PR title and add label if it matches prefixes
-        uses: actions/github-script@v8
+        uses: actions/github-script@v9
         continue-on-error: true
         with:
           script: |

.github/workflows/review-po-prs.yml

@@ -47,7 +47,7 @@ jobs:
         run: python .github/helper/po_pr_review.py
 
       - name: Post PO review comments
-        uses: actions/github-script@v8
+        uses: actions/github-script@v9
         with:
           script: |
             const fs = require("fs");