chore(github-actions): update condition for renovate[bot] trigger

Signed-off-by: Jan-Otto Kröpke <mail@jkroepke.de>

Author: jkroepke

.github/workflows/renovate-custom-hooks.yaml

@@ -17,7 +17,8 @@ jobs:
     runs-on: ubuntu-latest
     permissions:
       contents: read
-    if: github.repository_owner == 'jkroepke' && github.event.pull_request.user.login == 'renovate[bot]'
+    # zizmor: ignore[bot-conditions]
+    if: github.repository_owner == 'jkroepke' && github.actor == 'renovate[bot]'
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with: