Update DEVELOPMENT.md

.github/DEVELOPMENT.md

@@ -42,11 +42,9 @@ Or, the "main" branch:
 
 ```
 iwr https://aka.ms/dotnet/maui/maui-install.ps1 -OutFile maui-install.ps1;
-.\maui-install.ps1 -b 'main' -v '6.0.200-preview'
+.\maui-install.ps1 -b 'main' -v '6.0.300-preview'
 ``` 
 
-> NOTE: the branch (`-b 'main'`) and version (`-v 6.0.200-preview`) parameters. The `main` branch currently requires the 6.0.200 SDK band since the manifests are all in that SDK band - this will change in the future
-
 ### iOS / MacCatalyst
 
 iOS and MacCatalyst will require Xcode 13.1 Stable. You can get this [here](https://developer.apple.com/download/more/?name=Xcode).