ci: Automatically create merge-to-master PR on release branch push

Author: twpol

.github/workflows/release-pr.yml

@@ -0,0 +1,12 @@
+on:
+  push:
+    branches:
+      - "release/*"
+jobs:
+  release-pr:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Create PR
+        uses: funivan/[email protected]
+        env:
+          GITHUB_TOKEN: ${{ github.token }}