Use NGINX_PAT to checkout renovate's PRs (#2710)

Author: lucacome

.github/workflows/ci.yml

@@ -40,6 +40,7 @@ jobs:
         uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4.2.1
         with:
           fetch-depth: 0
+          token: ${{ github.actor == 'renovate[bot]' && secrets.NGINX_PAT || github.token }}
 
       - name: Setup Golang Environment
         uses: actions/setup-go@0a12ed9d6a96ab950c8f026ed9f722fe0da7ef32 # v5.0.2