Reorganize Homebrew installation instructions (#241)

Moved Homebrew installation instructions to a new section.

Author: LauJosefsen

README.md

@@ -37,13 +37,6 @@ Gitte keeps all your repos in sync, runs startup checks to verify your local mac
 
 ## Installation
 
-### Homebrew (macOS and Linux)
-
-```bash
-brew tap cego/gitte https://github.com/cego/gitte
-brew install cego/gitte/gitte
-```
-
 ### APT (Debian and Ubuntu)
 
 ```bash
@@ -53,6 +46,13 @@ sudo apt update
 sudo apt install gitte
 ```
 
+### Homebrew (macOS and Linux)
+
+```bash
+brew tap cego/gitte https://github.com/cego/gitte
+brew install cego/gitte/gitte
+```
+
 ### Binary download
 
 Download the latest binary from the [releases page](https://github.com/cego/gitte/releases) and place it on your `PATH`.