Use all threads in CI

Author: adazem009

.github/workflows/build.yml

@@ -27,5 +27,5 @@ jobs:
       run: cmake -B ${{github.workspace}}/build -DCMAKE_BUILD_TYPE=${{env.BUILD_TYPE}}
 
     - name: Build
-      run: cmake --build ${{github.workspace}}/build --config ${{env.BUILD_TYPE}}
+      run: cmake --build ${{github.workspace}}/build --config ${{env.BUILD_TYPE}} -j$(nproc --all)
 

.github/workflows/utests.yml

@@ -27,7 +27,7 @@ jobs:
       run: cmake -B ${{github.workspace}}/build -DCMAKE_BUILD_TYPE=${{env.BUILD_TYPE}} -DLIBSCRATCHCPP_BUILD_UNIT_TESTS=ON
 
     - name: Build
-      run: cmake --build ${{github.workspace}}/build --config ${{env.BUILD_TYPE}}
+      run: cmake --build ${{github.workspace}}/build --config ${{env.BUILD_TYPE}} -j$(nproc --all)
 
     - name: Run unit tests
       run: ctest --test-dir build -V