Fix the name of the command that will be run in docker_black

odoo_scripts/docker_black.py

@@ -38,7 +38,7 @@
     parser = basic_parser(program_license, program_version_message)
 
     parser.add_argument(
-        help="Run pylint on given directory (relative path, for example "
+        help="Run black on given directory (relative path, for example "
         "github.com/OCA/server-auth)",
         dest=_BLACK_DEST,
     )