Merge pull request dnGrep#1303 from doug24/2025-04-release

update .NET to 9.0.3 (9.0.202)

Author: doug24

appveyor.yml

@@ -16,7 +16,7 @@ assembly_info:
   assembly_file_version: '{version}'
   assembly_informational_version: '{version}'
 install: 
-  - ps: ./dotnet-install.ps1 -Channel 9.0 -Version 9.0.201
+  - ps: ./dotnet-install.ps1 -Channel 9.0 -Version 9.0.202
 before_build:
   - cmd: nuget restore
   - ps: ./make-msix.ps1