add check to ensure docs are served at proper url (GH was reverting custom domain name back to default)

Author: 05nelsonm

docs/releasing.md

@@ -109,6 +109,7 @@ git push
         - `pipenv shell`
         - `mkdocs serve` to check locally
         - `mkdocs gh-deploy` to deploy
+        - Ensure docs are served <a href="https://topl-android.matthewnelson.io" target="_blank">Here</a>
         - `exit`
     - Go to the <a href="https://github.com/05nelsonm/TorOnionProxyLibrary-Android/releases/new" target="_blank">Draft a new release</a> page,
       enter the release name ({{ topl_android.next_release }}) as tag and title, and have the description