Merge pull request #754 from 49Simon/add-label-ci

feat: add auto labeling for merged PRs

.github/workflows/label_release.yml

@@ -0,0 +1,18 @@
+name: Label Merged PRs
+
+on:
+  pull_request:
+    types: [closed]
+
+jobs:
+  label-merged-pr:
+    if: github.event.pull_request.merged == true
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Add label
+        if: startsWith(github.event.pull_request.base.ref, 'release/')
+        uses: actions-ecosystem/action-add-labels@v1
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          labels: merged-to-release