Add tmux-gh to the plugins list. (#125)

README.md

@@ -147,6 +147,7 @@ List of helpful tmux links for various tutorials, plugins, and configuration set
 - [tmux-fuzzback](https://github.com/roosta/tmux-fuzzback) Search your scrollback buffer using fzf.
 - [tmux-fzf-url](https://github.com/wfxr/tmux-fzf-url) For opening urls from browser quickly without mouse.
 - [tmux-fzf-session-switch](https://github.com/thuanOwa/tmux-fzf-session-switch) Easy way to switch, when you have a ton of sessions.
+- [tmux-gh](https://github.com/tardunge/tmux-gh) - Tmux plugin to fetch the github helper profile. Displays, the currently actively authenticated git username.
 - [tmux-keylocker](https://github.com/TheSast/tmux-keylocker) Lock away your tmux keybinds temporarely.
 - [tmux-menus](https://github.com/jaclu/tmux-menus) - Popup menus to help with managing your environment.
 - [tmux-modal](https://github.com/whame/tmux-modal) - Execute complex tmux commands in just a few keystrokes with a modal mode that is designed to be efficient, easy to remember and comfortable.