Merge branch 'develop' into 'master'

remove redundant submodule cmd

See merge request R3/school/courses!85

.ci/deploy.sh

@@ -17,9 +17,6 @@ else
     version="unstable";
 fi
 
-# build the unstable version - can be optimized
-git submodule update --recursive --init
-
 # add matomo
 sed -i "/matomohead/r./.ci/analytics/head.html" theme/templates/_index.html
 sed -i "/matomopolicy/r./.ci/analytics/policy.html" theme/templates/_index.html