Update README.md

Author: taooceros

README.md

@@ -393,5 +393,5 @@ Get in touch if you like to join the Flow-Launcher Team and help build this grea
 
 - Install .Net 9 SDK
   - via Visual Studio installer
-  - via winget `winget install Microsoft.DotNet.SDK.7`
+  - via winget `winget install Microsoft.DotNet.SDK.9`
   - Manually from [here](https://dotnet.microsoft.com/en-us/download/dotnet/9.0)