Merge pull request #614 from vbrandl/feature/dependabot-auto-changelog

Autogenerate changelog entry for dependabot PRs

.github/dependabot.yml

@@ -10,3 +10,4 @@ updates:
       - vbrandl
     labels:
       - dependencies
+      - dependabot

.github/workflows/dependabot-changelog.yml

@@ -0,0 +1,26 @@
+name: 'Dependabot Changelog'
+on:
+  pull_request:
+    types:
+      - opened
+      - synchronize
+      - reopened
+      - ready_for_review
+      - labeled
+      - unlabeled
+
+jobs:
+  changelog:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+      - uses: dangoslen/dependabot-changelog-helper@v3
+        with:
+          activationLabel: 'dependabot'
+      - uses: stefanzweifel/git-auto-commit-action@v4
+        with:
+          commit_message: "Update Changelog"