Update config.json

Change torch_dtype from `float16` to `bfloat16` as per request.

config.json

@@ -20,7 +20,7 @@
   "rms_norm_eps": 1e-05,
   "rope_scaling": null,
   "tie_word_embeddings": false,
-  "torch_dtype": "float16",
+  "torch_dtype": "bfloat16",
   "transformers_version": "4.32.0.dev0",
   "use_cache": true,
   "vocab_size": 32000