chore: Added notify-changelog workflow

.github/workflows/notify-changelog.yml

@@ -0,0 +1,27 @@
+# A GitHub action that notifies the developer
+# changelog repository of any new releases.
+
+name: Notify changelog
+
+on:
+  # Only trigger for a full release,
+  # ignoring pre-releases and drafts
+  release:
+    types:
+      - released
+
+jobs:
+  notify:
+    # This job can run on the latest Ubuntu
+    # and it should not take more than 3 minutes
+    runs-on: ubuntu-latest
+    timeout-minutes: 3
+
+    steps:
+      - name: Notify changelog of new release
+        uses: peter-evans/repository-dispatch@v1
+        with:
+          token: ${{ secrets.DISPATCH_ACCESS_TOKEN }}
+          repository: box/box-developer-changelog
+          event-type: new-release-note
+          client-payload: '{"ref": "${{ github.ref }}", "repository": "${{github.repository}}", "labels": "sdks,python", "repo_display_name": "Box Python SDK"}'