[CI] change clone of push workflow by a submodule update

4 jobs for add_larch_process_orange_contrib in 4 minutes and 58 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Test
passed #45462
test:python3.5-stretch-pyqt5_larch

00:02:35

passed #45461
test:python3.5-stretch-pyqt5_pymca

00:04:28

passed #45463
test:python3.5-stretch-pyqt5_pymca_larch

00:04:57

passed #45464
test:test-xas-tutorials_pymca

00:03:10