📑 docs: Update Mistral AI API example about dropParams (#1538)

librechat.example.yaml

@@ -49,12 +49,9 @@ endpoints:
         safe_mode: true # This field is specific to Mistral AI: https://docs.mistral.ai/api/
         
       # Drop Default params parameters from the request. See default params in guide linked below.
-      dropParams: ["stop", "temperature", "top_p"]
-      # - stop # dropped since it's not recognized by Mistral AI API
-      # `temperature` and `top_p` are removed to allow Mistral AI API defaults to be used:
-      # - temperature
-      # - top_p
-
+      # NOTE: For Mistral, it is necessary to drop the following parameters or you will encounter a 422 Error:
+      dropParams: ["stop", "user", "frequency_penalty", "presence_penalty"]
+      
     # OpenRouter.ai Example
     - name: "OpenRouter"
       # For `apiKey` and `baseURL`, you can use environment variables that you define.