Fix doc: `create-migration` has been renamed
@@ -194,7 +194,7 @@ Now we're ready to run a migration to apply this schema to the database.
Generate the migration
----------------------
-First, we generate a migration file with ``edgedb create-migration``. This
+First, we generate a migration file with ``edgedb migration create``. This
starts an interactive tool that asks a series of questions. Pay attention to
these questions to make sure you aren't making any unintended changes.
