Use .yaml instead of .yml

This is the recommended file extension: https://yaml.org/faq.html

.github/workflows/enforce-changelog.yaml

@@ -0,0 +1,19 @@
+# This workflow enforces the update of a changelog file on every pull request
+# For more information see: https://github.com/dangoslen/changelog-enforcer
+
+name: "Enforce Changelog"
+
+on:
+  pull_request:
+    types: [opened, synchronize, reopened, ready_for_review, labeled, unlabeled]
+
+jobs:
+  check:
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    steps:
+      - name: Enforce changelog️
+        uses: dangoslen/changelog-enforcer@v3
+        with:
+          changeLogPath: "CHANGELOG.md"
+          skipLabels: "Skip Changelog"