Update project readme with demo and description

README.md

@@ -2,20 +2,24 @@
 
 This is a tiny Chrome extension that adds a conventional comment button to GitLab file explorer comments, allowing to quickly leave a structured semantic comment during your MR reviews!
 
+## Demo
+
+![Demo](demo.gif)
+
 ## How to install
 
 This is a chrome extension, recently chrome disallowed to install packed `crx` extension that are not listed on the Chrome Store, so to install this
 
 - `git clone git@gitlab.com:conventionalcomments/conventional-comment-button.git`
 - On Chrome: Menu
-  -- More Tools
-  --- Extensions
+  - More Tools
+    - Extensions
 - In the Extension page: `Load unpacked` and select the cloned repository
 
 ## How to update
 
 - `git pull`
 - On Chrome: Menu
-  -- More Tools
-  --- Extensions
+  - More Tools
+    - Extensions
 - In the Extension page find `conventional comments button` and hit the refresh button