Fix a mistyped production command

When deploying https://framagit.org/anthologie-palatine/anthologyontology/-/merge_requests/56

The command was:

manage.py createinitialrevisions --comment="Initial revision"

It was probably(?) typed:

manage.py createinitialrevisions --comment="initial revision"

I wonder what was the command run on preprod but that env is down for now.