fix : bash ?

.gitlab/ci/build.gitlab-ci.yml

@@ -28,11 +28,11 @@ build:ubuntu_cpp:
           fi
       elif [ $(curl -s -o /dev/null -w "%{http_code}" "https://gitlab.eclipse.org/eclipse/aidge/$DEPENDENCY_NAME/-/tree/$CI_COMMIT_REF_NAME") -ne 404 ]; then
           # Pulling from branch with same name
-          BRANCH_TO_PULL=${CI_COMMIT_REF_NAME}
+          BRANCH_TO_PULL=$CI_COMMIT_REF_NAME
       fi
     - set +x
     - echo "Pulling from branch :"
-    - echo "${BRANCH_TO_PULL}"
+    # - echo "$BRANCH_TO_PULL"
 
     # Check group namespace is valid, if it is then we are in the official project(aidge group id=6437), otherwise we pull from the fork 
     - set -x