Move GitHub related lists under GitHub

readme.md

@@ -245,7 +245,9 @@ Check out my [blog](https://blog.sindresorhus.com) and follow me on [Twitter](ht
 - [Shell](https://github.com/alebcay/awesome-shell)
 - [Command-Line Apps](https://github.com/aharris88/awesome-cli-apps)
 - [ZSH Plugins](https://github.com/unixorn/awesome-zsh-plugins)
-- [Browser Extensions for GitHub](https://github.com/stefanbuck/awesome-browser-extensions-for-github)
+- [GitHub](https://github.com/phillipadsmith/awesome-github)
+    - [Browser Extensions](https://github.com/stefanbuck/awesome-browser-extensions-for-github)
+    - [Cheat Sheet](https://github.com/tiimgreen/github-cheat-sheet)
 - [Git Cheat Sheet](https://github.com/arslanbilal/git-cheat-sheet)
 - [Git Tips](https://github.com/git-tips/tips)
 - [Git Add-ons](https://github.com/stevemao/awesome-git-addons)
@@ -311,7 +313,6 @@ Check out my [blog](https://blog.sindresorhus.com) and follow me on [Twitter](ht
 - [Awesome](https://github.com/sindresorhus/awesome)
 - [Analytics](https://github.com/onurakpolat/awesome-analytics)
 - [FOSS for Developers](https://github.com/httpsGithubParty/FOSS-for-Dev)
-- [GitHub Cheat Sheet](https://github.com/tiimgreen/github-cheat-sheet)
 - [Open Companies](https://github.com/opencompany/awesome-open-company)
 - [REST](https://github.com/marmelab/awesome-rest)
 - [Selenium](https://github.com/christian-bromann/awesome-selenium)
@@ -350,7 +351,6 @@ Check out my [blog](https://blog.sindresorhus.com) and follow me on [Twitter](ht
 - [Social Media Share Links](https://github.com/vinkla/share-links)
 - [JSON Datasets](https://github.com/jdorfman/awesome-json-datasets)
 - [Microservices](https://github.com/mfornos/awesome-microservices)
-- [GitHub](https://github.com/phillipadsmith/awesome-github)
 - [Unicode Code Points](https://github.com/Codepoints/awesome-codepoints)
 - [Internet of Things](https://github.com/HQarroum/awesome-iot)
 - [Open Source Documents](https://github.com/nacyot/awesome-opensource-documents)