lock max gen len to 49

Signed-off-by: Nickinfinity <nikhilg.me@gmail.com>

mlc-chat-config.json

@@ -22,7 +22,7 @@
   "attention_sink_size": -1,
   "tensor_parallel_shards": 1,
   "mean_gen_len": 128,
-  "max_gen_len": 512,
+  "max_gen_len": 49,
   "shift_fill_factor": 0.3,
   "temperature": 0.7,
   "repetition_penalty": 1.0,
@@ -35,4 +35,4 @@
     "tokenizer.json"
   ],
   "version": "0.1.0"
-}
+}