chore(deps): update suzuki-shunsuke/github-action-renovate-config-validator action to v2.1.0

Author: renovate[bot]

.github/workflows/renovate.yml

@@ -12,4 +12,4 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v6
-      - uses: suzuki-shunsuke/github-action-renovate-config-validator@v2.0.0
+      - uses: suzuki-shunsuke/github-action-renovate-config-validator@v2.1.0