chore(deps): update actions/github-script action to v8 (#4789)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

.github/workflows/pr-checklist.yml

@@ -25,7 +25,7 @@ jobs:
     steps:
       - name: Check organization membership
         id: membership
-        uses: actions/github-script@v7
+        uses: actions/github-script@v8
         with:
           script: |
             try {
@@ -45,7 +45,7 @@ jobs:
 
       - name: Validate required checkboxes
         if: ${{ steps.membership.outputs.result == 'false' }}
-        uses: actions/github-script@v7
+        uses: actions/github-script@v8
         with:
           script: |
             const prBody = context.payload.pull_request.body || '';