ci/ros: checkout older commit

Author: jcarpent

.github/workflows/ros_ci.yml

@@ -40,5 +40,5 @@ jobs:
         run: |
           echo CCACHE_DIR=${CCACHE_DIR}
       # Run industrial_ci
-      - uses: 'ros-industrial/industrial_ci@master'
+      - uses: 'ros-industrial/industrial_ci@6a8f546cbd31fbd5c9f77e3409265c8b39abc3d6'
         env: ${{ matrix.env }}