Pin Windows workloads to version 8.0.403

Author: jamescrosswell

.github/actions/environment/action.yml

@@ -55,14 +55,15 @@ runs:
         dotnet-version: |
           6.0.x
           7.0.x
-          8.0.403
+          8.0.x
+          9.0.x
 
     - name: Install .NET Workloads
       shell: bash
       run: >
         dotnet workload install \
           wasm-tools maui-android \
           ${{ runner.os == 'macOS' && 'maui-ios maui-maccatalyst maui-windows macos' || '' }} \
-          ${{ runner.os == 'Windows' && 'maui-windows' || '' }} \
+          ${{ runner.os == 'Windows' && 'maui-windows --version 8.0.403' || '' }} \
           --temp-dir "${{ runner.temp }}" \
           --skip-sign-check