Update actions/github-script action to v8

| datasource  | package               | from | to |
| ----------- | --------------------- | ---- | -- |
| github-tags | actions/github-script | v7   | v8 |


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

Author: renovate[bot]

.github/workflows/benchmark.yml

@@ -60,7 +60,7 @@ jobs:
           cat bench.txt >> $GITHUB_ENV
           echo 'EOF' >> $GITHUB_ENV
 
-      - uses: actions/github-script@v7
+      - uses: actions/github-script@v8
         with:
           script: |
             // Get the existing comments.