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

Author: renovate[bot]

.github/workflows/lint.yml

@@ -75,6 +75,6 @@ jobs:
     steps:
       - uses: actions/checkout@v5
       - name: 🧼 lint renovate config
-        uses: suzuki-shunsuke/github-action-renovate-config-validator@v1.1.1
+        uses: suzuki-shunsuke/github-action-renovate-config-validator@v2.1.0
         with:
           config_file_path: 'renovate.json'