Add space after ⚠️ on installing.md

docs/installing.md

@@ -149,7 +149,7 @@ After completing the installation, you can:
   * or come say Hi in our support room — [#matrix-docker-ansible-deploy:devture.com](https://matrix.to/#/#matrix-docker-ansible-deploy:devture.com). You might learn something or get to help someone else new to Matrix hosting.
 - or help make this playbook better by contributing (code, documentation, or [coffee/beer](https://liberapay.com/s.pantaleev/donate))
 
-### ⚠️Keep the playbook and services up-to-date
+### ⚠️ Keep the playbook and services up-to-date
 
 While this playbook helps you to set up Matrix services and maintain them, it will **not** automatically run the maintenance task for you. You will need to update the playbook and re-run it **manually**.