Update README.md

Made some minor grammar edits

Author: lachlanPaul

README.md

@@ -1,8 +1,8 @@
 # Contribute to the documentation
 
-The docs are written in [Markdown](https://en.wikipedia.org/wiki/Markdown) if you need help with the syntax use [this guide](https://guides.github.com/features/mastering-markdown/). Mkdocs uses some [Markdown extensions](http://www.mkdocs.org/user-guide/writing-your-docs/#markdown-extensions) that you may have to familiarize with.
+These docs are written in [Markdown.](https://en.wikipedia.org/wiki/Markdown) If you need help with the syntax, use [this guide](https://guides.github.com/features/mastering-markdown/). Mkdocs uses some [Markdown extensions](http://www.mkdocs.org/user-guide/writing-your-docs/#markdown-extensions) that you may have to familiarize with.
 
-The documentation source is maintained via [Git](https://en.wikipedia.org/wiki/Git). For more info on how to use git [refer to their help](https://help.github.com/)
+The documentation source is maintained via [Git](https://en.wikipedia.org/wiki/Git). For more info on how to use git, [refer to Github's help page.](https://help.github.com/)
 
 In order to propose improvements to a document: