chore(deps): update actions/github-script action to v8

Author: renovate[bot]

.github/workflows/claude.yml

@@ -18,7 +18,7 @@ jobs:
     steps:
       - name: Check team membership
         id: check-membership
-        uses: actions/github-script@v7
+        uses: actions/github-script@v8
         with:
           script: |
             try {