docs: add cz-git commitizen adapter (#905)

Author: Zhengqbbb

README.md

@@ -277,6 +277,7 @@ We know that every project and build process has different requirements, so we'v
 - [commitiquette](https://github.com/martinmcwhorter/commitiquette)
 - [cz-format-extension](https://github.com/tyankatsu0105/cz-format-extension)
 - [cz-emoji-conventional](https://www.npmjs.com/package/cz-emoji-conventional)
+- [cz-git](https://github.com/Zhengqbbb/cz-git)
 
 To create an adapter, just fork one of these great adapters and modify it to suit your needs. We pass you an instance of [Inquirer.js](https://github.com/SBoudrias/Inquirer.js/), but you can capture input using whatever means necessary. Just call the `commit` callback with a string and we'll be happy. Publish it to npm, and you'll be all set!