build: fix workflows for net9.0

Author: phmatray

.github/workflows/dotnet.yml

@@ -21,7 +21,7 @@ jobs:
     - name: Setup .NET
       uses: actions/setup-dotnet@v4
       with:
-        dotnet-version: 8.x
+        dotnet-version: 9.x
 
     - name: Restore dependencies
       run: dotnet restore
@@ -33,4 +33,4 @@ jobs:
       run: dotnet test --no-build --verbosity normal --collect:"XPlat Code Coverage"
 
     - name: Upload Code Coverage
-      uses: codecov/codecov-action@v3
+      uses: codecov/codecov-action@v4

.github/workflows/publish-to-nuget.yml

@@ -19,7 +19,7 @@ jobs:
       - name: Setup .NET SDK
         uses: actions/setup-dotnet@v4
         with:
-          dotnet-version: 8.x
+          dotnet-version: 9.x
 
       - name: Cache NuGet packages
         uses: actions/cache@v4
@@ -48,7 +48,7 @@ jobs:
       - name: Setup .NET SDK
         uses: actions/setup-dotnet@v4
         with:
-          dotnet-version: 8.x
+          dotnet-version: 9.x
 
       - name: Run Test
         run: dotnet test --configuration $BUILD_CONFIG --no-build --verbosity normal --framework net7.0
@@ -71,7 +71,7 @@ jobs:
       - name: Setup .NET SDK
         uses: actions/setup-dotnet@v4
         with:
-          dotnet-version: 8.x
+          dotnet-version: 9.x
 
       - name: Publish to NuGet
         if: startsWith(github.ref, 'refs/tags')