Verify changelog change on PR

.github/workflows/verify_changelog_change.yml

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+name: Verify Changelog.md update
+
+# Controls when the workflow will run
+on:
+  # Triggers the workflow on pull request events but only for the develop branch
+  pull_request:
+    branches: [ develop ]
+
+# A workflow run is made up of one or more jobs that can run sequentially or in parallel
+jobs:
+  # This workflow contains a single job called "confirm"
+  confirm-changelog-update:
+    # The type of runner that the job will run on
+    runs-on: ubuntu-latest
+    
+    name: Verify that the PR contains an update to changelog.md
+
+    # Steps represent a sequence of tasks that will be executed as part of the job
+    steps:
+      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
+      - uses: actions/checkout@v2
+
+      - name: Get changed files
+        id: changed-files
+        uses: tj-actions/changed-files@v8.4
+        with:
+          files: |
+            changelog.md
+          
+      - name: Fail if no change to changelog.md
+        if: steps.changed-files.outputs.any_changed != 'true'
+        run: exit 1