docs: add model_name field to ollama completion configuration (#2542)

* docs: add model_name field to ollama completion configuration

* fix document for openai/chat

website/docs/administration/model.md

@@ -33,6 +33,7 @@ For setting up the `ollama` model, apply the configuration below:
 ```toml
 [model.completion.http]
 kind = "ollama/completion"
+model_name = "codellama:7b"
 api_endpoint = "http://localhost:8888"
 prompt_template = "<PRE> {prefix} <SUF>{suffix} <MID>"  # Example prompt template for CodeLlama model series.
 ```
@@ -62,9 +63,9 @@ For `local` configuration, use:
 model_id = "StarCoder2-3B"
 ```
 
-#### http
+#### openai/chat
 
-For `HTTP` configuration, the settings are as follows:
+To configure Tabby's chat functionality with an OpenAI-compatible chat model (`/v1/chat/completions`), apply the settings below. This example uses the API platform of DeepSeek. Similar configurations can be applied for other LLM vendors such as Mistral, OpenAI, etc.
 
 ```toml
 [model.chat.http]