fix stray comma in models2.json

Signed-off-by: Aaron Miller <apage43@ninjawhale.com>

gpt4all-chat/metadata/models2.json

@@ -12,7 +12,7 @@
     "type": "Mistral",
     "systemPrompt": " ",
     "description": "<strong>Best overall fast chat model</strong><br><ul><li>Fast responses</li><li>Chat based model</li><li>Trained by Mistral AI<li>Finetuned on OpenOrca dataset curated via <a href=\"https://atlas.nomic.ai/\">Nomic Atlas</a><li>Licensed for commercial use</ul>",
-    "url": "https://gpt4all.io/models/gguf/mistral-7b-openorca.Q4_0.gguf",
+    "url": "https://gpt4all.io/models/gguf/mistral-7b-openorca.Q4_0.gguf"
   },
   {
     "order": "b",