Fix command reset's arity (#8212)

src/server.c

@@ -1059,7 +1059,7 @@ struct redisCommand redisCommandTable[] = {
      "read-only @string",
      0,lcsGetKeys,0,0,0,0,0,0},
 
-    {"reset",resetCommand,-1,
+    {"reset",resetCommand,1,
      "no-script ok-stale ok-loading fast @connection",
      0,NULL,0,0,0,0,0,0}
 };