test with dotnet 7

Author: wing328

…b/workflows/samples-dotnet8-appveyor.yml …ub/workflows/samples-dotnet-appveyor.yml.github/workflows/samples-dotnet8-appveyor.yml renamed to .github/workflows/samples-dotnet-appveyor.yml .github/workflows/samples-dotnet8-appveyor.yml renamed to .github/workflows/samples-dotnet-appveyor.yml

@@ -47,7 +47,7 @@ jobs:
       - uses: actions/checkout@v5
       - uses: actions/[email protected]
         with:
-          dotnet-version: '8.0.x'
+          dotnet-version: '7.0.x'
       - name: Build
         working-directory: ${{ matrix.sample }}
         run: dotnet build Org.OpenAPITools.sln