Fix MSBuild configuration: use Retail instead of Release

Author: Cheaterdev

.github/workflows/build.yml

@@ -31,7 +31,7 @@ jobs:
       uses: microsoft/setup-msbuild@v2
 
     - name: Build solution
-      run: msbuild ./projects/spectrum.sln /p:Configuration=Release /p:Platform=x64 /m
+      run: msbuild ./projects/spectrum.sln /p:Configuration=Retail /p:Platform=x64 /m
 
     - name: Upload build artifacts
       uses: actions/upload-artifact@v4