chore(renovate): fix renovate automerge (#27)

.github/workflows/renovate-delegate.yaml

@@ -0,0 +1,19 @@
+# Merge using service account when renovate automerges
+name: Renovatebot Bors Merge
+
+on:
+  issue_comment:
+    types: [created]
+
+jobs:
+  service-account-merge:
+    if: ${{ contains( github.event.comment.body, 'service-account merge') && github.event.issue.pull_request && github.actor == 'renovate[bot]' }}
+    name: Service Account Merge
+    runs-on: ubuntu-latest
+    steps:
+      - name: Merge Comment
+        uses: thollander/actions-comment-pull-request@v1
+        with:
+          message: bors r+
+          GITHUB_TOKEN: ${{ secrets.GH_SA_TOKEN }}
+          pr_number: ${{ github.event.issue.number }}