ci: trigger docker image build

Author: lterrac

.build-tools/containers/buildenv/Dockerfile

@@ -18,4 +18,5 @@ RUN git clone -b v0.3.28 --single-branch --depth 1 https://github.com/OpenMathLi
   sudo make PREFIX=/usr/local install && \
   sudo rm -rf ${HOME}/OpenBLAS
 
+  
 WORKDIR $HOME