0509 faq (#693)

### What problem does this PR solve?

Editorial updates only. 

### Type of change

- [x] Documentation Update

README.md

 
 ## 📌 Latest Features
 
-- 2024-05-08 Integrates LLM DeepSeek.
+- 2024-05-08 Integrates LLM DeepSeek-V2.
 - 2024-04-26 Adds file management.
 - 2024-04-19 Supports conversation API ([detail](./docs/conversation_api.md)).
 - 2024-04-16 Integrates an embedding model 'bce-embedding-base_v1' from [BCEmbedding](https://github.com/netease-youdao/BCEmbedding), and [FastEmbed](https://github.com/qdrant/fastembed), which is designed specifically for light and speedy embedding.
 - 2024-04-11 Supports [Xinference](./docs/xinference.md) for local LLM deployment.
-- 2024-04-10 Adds a new layout recognition model for analyzing Laws documentation.
+- 2024-04-10 Adds a new layout recognition model for analyzing legal documents.
 - 2024-04-08 Supports [Ollama](./docs/ollama.md) for local LLM deployment.
 - 2024-04-07 Supports Chinese UI.
 

docs/faq.md

 2. Right click the desired knowledge base to display the **Configuration** dialogue. 
 3. Choose **Q&A** as the chunk method and click **Save** to confirm your change. 
 
-### 7 Do I need to connect to Redis?
+### 7. Do I need to connect to Redis?
 
 No, connecting to Redis is not required. 
 
-### 8 `Error: Range of input length should be [1, 30000]`
+### 8. `Error: Range of input length should be [1, 30000]`
 
 This error occurs because there are too many chunks matching your search criteria. Try reducing the **TopN** and increasing **Similarity threshold** to fix this issue: 
 
 
 ![topn](https://github.com/infiniflow/ragflow/assets/93570324/7ec72ab3-0dd2-4cff-af44-e2663b67b2fc)
 
-### 9 How to upgrade RAGFlow?
+### 9. How to upgrade RAGFlow?
    
-   You can upgrade RAGFlow to either the dev version or the latest version 
+You can upgrade RAGFlow to either the dev version or the latest version:
+
 - Dev versions are for developers and contributors. They are published on a nightly basis and may crash because they are not fully tested. We cannot guarantee their validity and you are at your own risk trying out latest, untested features.
-- The latest version is stable and reliable, and works best with RAGFlow users.
+- The latest version refers to the most recent, officially published release. It is stable and works best with regular users.
 
 
-   Update RAGFlow to dev version:
+To upgrade RAGFlow to the dev version:
 
 1. Pull the latest source code
    ```bash
    docker compose -f docker-compose-CN.yml up -d
    ```
    
-To upgrade RAGFlow to latest version:
+To upgrade RAGFlow to the latest version:
 
 1. Update **ragflow/docker/.env** as follows:
    ```bash