Update build_on_demand.yml

Author: Sygmei

.github/workflows/build_on_demand.yml

@@ -95,7 +95,7 @@ jobs:
       shell: pwsh
     - name: Compile ObEngine
       working-directory: ./obengine
-      run: cmake --build build --config Release -- /MP /m:8
+      run: cmake --build build --config Release -- /m:8
     - name: Run tests
       working-directory: ./obengine
       run: ./build/tests/Release/ObEngineTests.exe