📝 Update installation guide in README

Gut on Windows now uses `scoop` to be installed.
Also, I've added a tutorial to build from source

README.md

@@ -10,16 +10,17 @@ If you have years of muscle memory, gut isn’t probably for you.
 
 To install gut on Windows, run
 
-```bash
-choco install gut
+```powershell
+scoop bucket add gut https://github.com/julien040/gut-scoop
+scoop install gut/gut
 ```
 
 ### MacOS
 
 To install gut on macOS, open the Terminal and run
 
 ```bash
-brew install julien040/gut-tap
+Brew tap julien040/gut && brew install gut
 ```
 
 ### Apt-get
@@ -44,6 +45,14 @@ sudo yum update
 sudo yum install gut
 ```
 
+### Build from source
+
+You need to have go installed on your machine
+
+```bash
+go install github.com/julien040/gut@latest
+```
+
 ## Example
 
 ```bash