fix : yaml

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

@@ -31,7 +31,7 @@ build:ubuntu_cpp:
           BRANCH_TO_PULL=$CI_COMMIT_REF_NAME
       fi
     - set +x
-    - echo "Pulling from branch: $BRANCH_TO_PULL"
+    - echo "Pulling from branch:\"$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