Update actions/github-script action to v8 (#31846)

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

.github/workflows/report-size.yml

@@ -29,7 +29,7 @@ jobs:
       # Using actions/download-artifact doesn't work here
       # https://github.com/actions/download-artifact/issues/60
       - name: Download artifact
-        uses: actions/github-script@f28e40c7f34bde8b3046d885e986cb6290c5673b # v7
+        uses: actions/github-script@ed597411d8f924073f98dfc5c65a23a2325f34cd # v8
         id: download-artifact
         with:
           result-encoding: string