Update actions/github-script action to v8 (#65)

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

Author: renovate[bot]

.github/workflows/stress-test.yaml

@@ -21,7 +21,7 @@ jobs:
         run: ./ci/run-stress-tests.sh > stress_results.md
 
       - name: Comment PR with stress test results
-        uses: actions/github-script@v7
+        uses: actions/github-script@ed597411d8f924073f98dfc5c65a23a2325f34cd # v8
         with:
           script: |
             const fs = require('fs');