Update actions/github-script action to v8 (#5)

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

Author: renovate[bot]

action.yaml

@@ -25,7 +25,7 @@ runs:
   steps:
     - name: Normalize URL and fetch ID token
       id: prepare
-      uses: actions/github-script@v7
+      uses: actions/github-script@v8
       with:
         debug: false
         script: |