(CI) fix shellcheck

Author: MatthijsBurgh

.ci/install.bash

@@ -112,7 +112,7 @@ docker cp "${BASEDIR}"/get_install_build_packages.py tue-env:"${DOCKER_HOME}"
 
 echo -e "\e[35m\e[1m~/get_message_packages.py base_local_planner costmap_2d\e[0m"
 eval "$(docker exec -t tue-env bash -c 'source ~/.bashrc; ${HOME}/get_install_build_packages.py base_local_planner costmap_2d' | tr -d '\r')" # Skip base_local_planner and costmap_2d as these take too much time
-INSTALL_BUILD_TARGETS=(${INSTALL_BUILD_PKGS[@]/#/ros-})
+INSTALL_BUILD_TARGETS=("${INSTALL_BUILD_PKGS[@]/#/ros-}")
 echo -e "\e[35m\e[1mINSTALL_BUILD_PKGS=" "${INSTALL_BUILD_PKGS[*]}" "\e[0m"
 echo -e "\e[35m\e[1mBUILD_PKGS=" "${BUILD_PKGS[*]}" "\e[0m"