Use Ninja

Try improve build speed with Ninja

Author: kohnech

.github/workflows/linux_build.yaml

@@ -33,6 +33,6 @@ jobs:
         sudo apt update
         sudo apt install -y libboost-all-dev libboost-test-dev
     - name: cmake configure
-      run : mkdir build; cd build; cmake -DCMAKE_BUILD_TYPE=Release -DQL_BUILD_EXAMPLES=false -DQL_BUILD_TEST_SUITE=false -DQL_BUILD_BENCHMARK=false -DQL_ENABLE_SESSIONS=true -DORE_BUILD_DOC=false ..
+      run : mkdir build; cd build; cmake -DCMAKE_BUILD_TYPE=Release -DQL_BUILD_EXAMPLES=false -DQL_BUILD_TEST_SUITE=false -DQL_BUILD_BENCHMARK=false -DQL_ENABLE_SESSIONS=true -DORE_BUILD_DOC=false -G "Ninja" ..
     - name: cmake build
       run: cd build/; pwd; cmake --build . -j $(nproc)