Update build.yaml

Author: AdamR05

.github/workflows/build.yaml

@@ -129,7 +129,7 @@ jobs:
         git submodule update --init --recursive
     
     - name: Configure CMake
-      run: cmake -B ${{github.workspace}}/build -G Ninja -DCMAKE_BUILD_TYPE=${{env.BUILD_TYPE}}
+      run: cmake -B ${{github.workspace}}/build -G Ninja -DCMAKE_BUILD_TYPE=${{env.BUILD_TYPE}} -DBN_ALLOW_STUBS=ON
 
     - name: Build
       run: cmake --build ${{github.workspace}}/build --config ${{env.BUILD_TYPE}}