release pipeline updated

Author: pksorensen

.github/workflows/release.yml

@@ -12,14 +12,14 @@ jobs:
     name: Testing
     strategy:
       matrix:
-        dotnet: ['net6.0', 'net7.0', 'net462', 'net48','net8.0' ]
+        dotnet: ['net8.0', 'net9.0', 'net462', 'net48','net8.0' ]
     steps:
       - name: Checkout code base
         uses: actions/checkout@v2
 
       - uses: actions/setup-dotnet@v3
         with:
-          dotnet-version: '8.0.x'
+          dotnet-version: '9.0.x'
 
       - name: Run tests
         run: dotnet test --verbosity normal -f ${{ matrix.dotnet }}
@@ -36,7 +36,7 @@ jobs:
 
       - uses: actions/setup-dotnet@v3
         with:
-          dotnet-version: '8.0.x'
+          dotnet-version: '9.0.x'
 
       - uses: actions/setup-node@v3
         with: