CI:22.04 use -j4 to fix disk space error

Author: k-okada

.github/workflows/config.yml

@@ -154,7 +154,6 @@ jobs:
         ROS_ONE_VARIANT: [techfak]
         BUILD_PKGS: ['jsk_recognition_msgs audio_to_spectrogram sound_classification', 'checkerboard_detector imagesift jsk_perception jsk_recognition_utils resized_image_transport', 'jsk_pcl_ros_utils jsk_pcl_ros']
 
-
     runs-on: ${{ matrix.ARCH == 'x64' && format('ubuntu-{0}', matrix.DEB_DISTRO) || (matrix.ARCH == 'arm64' && format('ubuntu-{0}-arm', matrix.DEB_DISTRO) || format('ubuntu-{0}', matrix.DEB_DISTRO)) }}
 
     env:
@@ -238,6 +237,6 @@ jobs:
           source /opt/ros/one/setup.bash
           set -x
           cd ~/ws/
-          catkin build ${{ matrix.BUILD_PKGS }} --no-status -sv ${{ matrix.CATKIN_OPTIONS }} --cmake-args -DCATKIN_ENABLE_TESTING=OFF -DCMAKE_VERBOSE_MAKEFILE:BOOL=ON ${{ matrix.CMAKE_OPTIONS }}
+          catkin build ${{ matrix.BUILD_PKGS }} ${{ matrix.DEB_DISTRO == '22.04' && '-j4' }} --no-status -sv ${{ matrix.CATKIN_OPTIONS }} --cmake-args -DCATKIN_ENABLE_TESTING=OFF -DCMAKE_VERBOSE_MAKEFILE:BOOL=ON ${{ matrix.CMAKE_OPTIONS }}
         shell: bash