Update build.yml

Only publish `RLBotCS` project

Author: VirxEC

.github/workflows/build.yml

@@ -23,7 +23,7 @@ jobs:
       run: dotnet test
 
     - name: Build 
-      run: dotnet publish -r win-x64
+      run: dotnet publish RLBotCS -r win-x64
 
     - name: Upload build artifact
       uses: actions/upload-artifact@v4
@@ -49,7 +49,7 @@ jobs:
         dotnet csharpier . --check
 
     - name: Build 
-      run: dotnet publish -r linux-x64
+      run: dotnet publish RLBotCS -r linux-x64
 
     - name: Upload build artifact
       uses: actions/upload-artifact@v4