Update schema.md using CI

2 jobs for next in 52 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Build
passed #1799
build_schema_doc

00:00:38

 
  Deploy
failed #1800
commit_schema_md

00:00:13

 
Name Stage Failure
failed
commit_schema_md Deploy
$ mkdir -p ~/.ssh
$ ssh-keyscan -t rsa git.opendatafrance.net >> ~/.ssh/known_hosts
# git.opendatafrance.net:22 SSH-2.0-OpenSSH_7.4p1 Debian-10+deb9u6
$ git clone --branch $CI_COMMIT_REF_NAME $CI_REPOSITORY_URL
Cloning into 'subventions'...
$ cd $CI_PROJECT_NAME
$ git add schema.md
fatal: pathspec 'schema.md' did not match any files
ERROR: Job failed: exit code 1