Add alpha banner to README.md

README.md

@@ -1,5 +1,7 @@
 # Gut
 
+> ⚠️ Gut is still in alpha which means that there may be some features that are missing
+
 Gut is a CLI designed to make Git easier to use.
 
 If you have years of muscle memory, gut isn’t probably for you.
@@ -11,7 +13,7 @@ If you have years of muscle memory, gut isn’t probably for you.
 
 To install gut on Windows, run
 
-```powershell
+```bash
 scoop bucket add gut https://github.com/julien040/gut-scoop
 scoop install gut/gut
 ```
@@ -178,4 +180,4 @@ Contributions are always welcome!
 
 See `contributing.md` for ways to get started.
 
-Please adhere to this project's `code of conduct`.
+Please adhere to this project's `code of conduct`.