Update to .NET 9 Preview 7

Author: dodyg

projects/net9/README.md

@@ -1,6 +1,6 @@
 # ASP.NET Core 9 (3)
 
-These samples require SDK [9.0.100-preview.6](https://dotnet.microsoft.com/en-us/download/dotnet/9.0)
+These samples require SDK [9.0.100-preview.7](https://dotnet.microsoft.com/en-us/download/dotnet/9.0)
 
 * [TypedResults.InternalServerError](typed-results-2)
 

projects/net9/global.json

@@ -1,6 +1,6 @@
 {
  "sdk": {
- "version": "9.0.100-preview.6.24328.19",
+ "version": "9.0.100-preview.7.24407.12 ",
  "rollForward": "major"
  }
 }