Use v2 tag for Docker example

Author: code-asher

README.md

@@ -5,7 +5,7 @@ remote server, accessible through the browser.
 
 Try it out:
 ```bash
-docker run -it -p 127.0.0.1:8080:8080 -v "${HOME}/.local/share/code-server:/home/coder/.local/share/code-server" -v "$PWD:/home/coder/project" codercom/code-server
+docker run -it -p 127.0.0.1:8080:8080 -v "${HOME}/.local/share/code-server:/home/coder/.local/share/code-server" -v "$PWD:/home/coder/project" codercom/code-server:v2
 ```
 
 - **Consistent environment:** Code on your Chromebook, tablet, and laptop with a