Update actions/github-script action to v8

Author: renovate[bot]

.github/workflows/blocked.yaml

@@ -10,7 +10,7 @@ jobs:
             pull-requests: read
         steps:
             - name: Add notice
-              uses: actions/github-script@v7
+              uses: actions/github-script@v8
               if: contains(github.event.pull_request.labels.*.name, 'X-Blocked')
               with:
                   script: |