Fix CI build to use distro binary packages (#58)

Signed-off-by: Nordmann Arne (CR/ADT3) <arne.nordmann@de.bosch.com>

Author: norro

.github/workflows/ci.yaml

@@ -26,6 +26,7 @@ jobs:
       with:
         package-name: "system_modes system_modes_examples"
         target-ros2-distro: ${{ matrix.ros_distribution }}
+        vcs-repo-file-url: ""
         colcon-mixin-name: coverage-gcc
         colcon-mixin-repository: https://raw.githubusercontent.com/colcon/colcon-mixin-repository/master/index.yaml
     - uses: codecov/codecov-action@v1