📝 docs: Add reference to model providers. (lobehub#2973)

* Add reference to model providers.

* Update model-list.mdx

docs/self-hosting/advanced/model-list.mdx

@@ -12,7 +12,7 @@ tags:
 
 # Model List
 
-LobeChat supports customizing the model list during deployment. You can use `+` to add a model, `-` to hide a model, and use `model name=display name<extension configuration>` to customize the display name of a model, separated by English commas. The basic syntax is as follows:
+LobeChat supports customizing the model list during deployment. This configuration is done in the environment for each [model provider](/docs/self-hosting/environment-variables/model-provider). You can use `+` to add a model, `-` to hide a model, and use `model name=display name<extension configuration>` to customize the display name of a model, separated by English commas. The basic syntax is as follows:
 
 ```text
 id=displayName<maxToken:vision:fc:file>,model2,model3