Add changelog.

.github/workflows/changelog.yaml

@@ -0,0 +1,19 @@
+name: ChangelogUpdated
+on:
+  pull_request:
+    types: [assigned, opened, synchronize, reopened, labeled, unlabeled]
+    branches:
+      - develop
+jobs:
+  build:
+    name: Check Actions
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v1
+      - name: Changelog check
+        uses: Zomzog/[email protected]
+        with:
+          fileName: doc/versionHistory.rst
+          checkNotification: Simple
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}