👷 Add GitHub Action Latest Changes (#321)

.github/workflows/latest-changes.yml

@@ -0,0 +1,38 @@
+name: Latest Changes
+
+on:
+  pull_request_target:
+    branches:
+      - master
+    types:
+      - closed
+  workflow_dispatch:
+    inputs:
+      number:
+        description: PR number
+        required: true
+      debug_enabled:
+        description: 'Run the build with tmate debugging enabled (https://github.com/marketplace/actions/debugging-with-tmate)'     
+        required: false
+        default: false
+
+jobs:
+  latest-changes:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          # To allow latest-changes to commit to the main branch
+          token: ${{ secrets.ACTIONS_TOKEN }}
+      # Allow debugging with tmate
+      - name: Setup tmate session
+        uses: mxschmitt/action-tmate@v3
+        if: ${{ github.event_name == 'workflow_dispatch' && github.event.inputs.debug_enabled }}
+        with:
+          limit-access-to-actor: true
+      - uses: docker://tiangolo/latest-changes:0.0.3
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          latest_changes_file: docs/release-notes.md
+          latest_changes_header: '## Latest Changes\n\n'
+          debug_logs: true