Capitalization fixes

Author: jimporter

README.md

@@ -22,7 +22,7 @@ While mike is flexible, it's optimized around putting your docs in a
 particularly notable versions. This makes it easy to make permalinks to whatever
 version of the documentation you want to direct people to.
 
-## How it works
+## How It Works
 
 mike works by creating a new Git commit on your `gh-pages` branch every time you
 deploy a new version of your docs using `mike deploy` (or other mike subcommands