Improve an error message

Make it the same as another nearby message.

src/backend/replication/logical/tablesync.c

@@ -758,7 +758,7 @@ fetch_remote_table_info(char *nspname, char *relname,
 
 	if (res->status != WALRCV_OK_TUPLES)
 		ereport(ERROR,
-				(errmsg("could not fetch table info for table \"%s.%s\": %s",
+				(errmsg("could not fetch table info for table \"%s.%s\" from publisher: %s",
 						nspname, relname, res->err)));
 
 	/* We don't know the number of rows coming, so allocate enough space. */