rabbit_db: Fix inconsistent comment

The comment preceding the `get_consistent()` function was `get()`. Pun
probably intended.

Author: dumbbell

deps/rabbit/src/rabbit_db_maintenance.erl

@@ -152,7 +152,7 @@ get_in_mnesia(Node) ->
     end.
 
 %% -------------------------------------------------------------------
-%% get().
+%% get_consistent().
 %% -------------------------------------------------------------------
 
 -spec get_consistent(Node) -> Status when