models2.json: add tokenizer merges to mpt-7b-chat model (#1563)

gpt4all-chat/metadata/models2.json

@@ -94,17 +94,17 @@
   },
   {
     "order": "h",
-    "md5sum": "f5bc6a52f72efd9128efb2eeed802c86",
+    "md5sum": "cf5e8f73747f9d7c6fe72a629808c1de",
     "name": "MPT Chat",
-    "filename": "mpt-7b-chat-q4_0.gguf",
-    "filesize": "3911522272",
+    "filename": "mpt-7b-chat-merges-q4_0.gguf",
+    "filesize": "3796133728",
     "requires": "2.5.0",
     "ramrequired": "8",
     "parameters": "7 billion",
     "quant": "q4_0",
     "type": "MPT",
     "description": "<strong>Good model with novel architecture</strong><br><ul><li>Fast responses<li>Chat based<li>Trained by Mosaic ML<li>Cannot be used commercially</ul>",
-    "url": "https://gpt4all.io/models/gguf/mpt-7b-chat-q4_0.gguf",
+    "url": "https://gpt4all.io/models/gguf/mpt-7b-chat-merges-q4_0.gguf",
     "promptTemplate": "<|im_start|>user\n%1<|im_end|><|im_start|>assistant\n",
     "systemPrompt": "<|im_start|>system\n- You are a helpful assistant chatbot trained by MosaicML.\n- You answer questions.\n- You are excited to be able to help the user, but will refuse to do anything that could be considered harmful to the user.\n- You are more than just an information source, you are also able to write poetry, short stories, and make jokes.<|im_end|>"
   },