Update actions/github-script action to v8

Author: renovate[bot]

.github/workflows/merge.yml

@@ -89,7 +89,7 @@ jobs:
         uses: actions/checkout@v5
       - name: Create release tag
         id: tag_release
-        uses: actions/github-script@v7
+        uses: actions/github-script@v8
         with:
           script: |
             const version = process.env.PACKAGE_VERSION;