Update README.md

Author: itsuhane

README.md

@@ -7,14 +7,15 @@ Automatically use the correct input source.
 Ever hassled by wrong input source when switching application?  
 SwitchKey can automatically activate your choice for you.
 
-### Download & Install
+## Download & Install
 
-- Manually:
+### Manually:
 
-Download: [![Latest](https://img.shields.io/badge/dynamic/json?color=brightgreen&label=latest&query=%24.tag_name&url=https%3A%2F%2Fapi.github.com%2Frepos%2Fitsuhane%2FSwitchKey%2Freleases%2Flatest&style=social)](https://github.com/itsuhane/SwitchKey/releases/latest/download/SwitchKey.zip) (macOS)  
+Download (macOS):  
+[![Latest](https://img.shields.io/badge/dynamic/json?color=brightgreen&label=latest&query=%24.tag_name&url=https%3A%2F%2Fapi.github.com%2Frepos%2Fitsuhane%2FSwitchKey%2Freleases%2Flatest&style=social)](https://github.com/itsuhane/SwitchKey/releases/latest/download/SwitchKey.zip)  
 Uncompress, then drag & drop into your Applications folder.
 
-- Via Homebrew (thanks to [@fanvinga](//github.com/fanvinga/)):
+### Via Homebrew (thanks to [@fanvinga](//github.com/fanvinga/)):
 
 ```
 brew cask install switchkey