Differentiated API key names to avoid confusion. (#3107)

### What problem does this PR solve?


### Type of change


- [x] Documentation Update

docs/guides/llm_api_key_setup.md

@@ -3,13 +3,13 @@ sidebar_position: 5
 slug: /llm_api_key_setup
 ---
 
-# Configure your API key
+# Configure model API key
 
-An API key is required for RAGFlow to interact with an online AI model. This guide provides information about setting your API key in RAGFlow.
+An API key is required for RAGFlow to interact with an online AI model. This guide provides information about setting your model API key in RAGFlow.
 
-## Get your API key
+## Get model API key
 
-For now, RAGFlow supports the following online LLMs. Click the corresponding link to apply for your API key. Most LLM providers grant newly-created accounts trial credit, which will expire in a couple of months, or a promotional amount of free quota.
+For now, RAGFlow supports the following online LLMs. Click the corresponding link to apply for your model API key. Most LLM providers grant newly-created accounts trial credit, which will expire in a couple of months, or a promotional amount of free quota.
 
 - [OpenAI](https://platform.openai.com/login?launch)
 - [Azure-OpenAI](https://ai.azure.com/)
@@ -32,14 +32,14 @@ For now, RAGFlow supports the following online LLMs. Click the corresponding lin
 If you find your online LLM is not on the list, don't feel disheartened. The list is expanding, and you can [file a feature request](https://github.com/infiniflow/ragflow/issues/new?assignees=&labels=feature+request&projects=&template=feature_request.yml&title=%5BFeature+Request%5D%3A+) with us! Alternatively, if you have customized or locally-deployed models, you can [bind them to RAGFlow using Ollama, Xinferenc, or LocalAI](./deploy_local_llm.mdx).
 :::
 
-## Configure your API key
+## Configure model API key
 
-You have two options for configuring your API key:
+You have two options for configuring your model API key:
 
 - Configure it in **service_conf.yaml** before starting RAGFlow.
 - Configure it on the **Model Providers** page after logging into RAGFlow.
 
-### Configure API key before starting up RAGFlow
+### Configure model API key before starting up RAGFlow
 
 1. Navigate to **./docker/ragflow**.
 2. Find entry **user_default_llm**:
@@ -51,10 +51,10 @@ You have two options for configuring your API key:
    
    *After logging into RAGFlow, you will find your chosen model appears under **Added models** on the **Model Providers** page.*
 
-### Configure API key after logging into RAGFlow
+### Configure model API key after logging into RAGFlow
 
 :::caution WARNING
-After logging into RAGFlow, configuring API key through the **service_conf.yaml** file will no longer take effect.
+After logging into RAGFlow, configuring your model API key through the **service_conf.yaml** file will no longer take effect.
 :::
 
 After logging into RAGFlow, you can *only* configure API Key on the **Model Providers** page:
@@ -62,11 +62,11 @@ After logging into RAGFlow, you can *only* configure API Key on the **Model Prov
 1. Click on your logo on the top right of the page **>** **Model Providers**.
 2. Find your model card under **Models to be added** and click **Add the model**:
    ![add model](https://github.com/infiniflow/ragflow/assets/93570324/07e43f63-367c-4c9c-8ed3-8a3a24703f4e)
-3. Paste your API key.
+3. Paste your model API key.
 4. Fill in your base URL if you use a proxy to connect to the remote service.
 5. Click **OK** to confirm your changes.
 
 :::note
-If you wish to update an existing API key at a later point:
+To update an existing model API key at a later point:
 ![update api key](https://github.com/infiniflow/ragflow/assets/93570324/0bfba679-33f7-4f6b-9ed6-f0e6e4b228ad)
 :::