Updated instructions on upgrading to RAGFlow dev (#3175)

### What problem does this PR solve?



### Type of change


- [x] Documentation Update

docker/README.md

@@ -4,6 +4,7 @@
 Look into [.env](./.env), there're some important variables.
 
 ## MYSQL_PASSWORD
+
 The mysql password could be changed by this variable. But you need to change *mysql.password* in [service_conf.yaml](./service_conf.yaml) at the same time.
 
 

docs/guides/upgrade_ragflow.md

@@ -18,7 +18,13 @@ You can upgrade RAGFlow to dev version or the latest version:
    RAGFLOW_IMAGE=infiniflow/ragflow:dev
    ```
 
-2. Update RAGFlow image and restart RAGFlow:
+2. Pull the latest code from inside Docker:
+
+   ```bash
+   git pull
+   ```
+
+3. Update RAGFlow image and restart RAGFlow:
 
    ```bash
    docker compose -f docker/docker-compose.yml pull

docs/references/http_api_reference.md

@@ -1,5 +1,5 @@
+---
 sidebar_position: 0
-
 slug: /http_api_reference
 ---
 
@@ -70,7 +70,7 @@ curl --request POST \
 
 - `"language"`: (*Body parameter*), `string`  
   The language setting of the dataset to create. Available options:  
-  - `"English"` (Default)
+  - `"English"` (default)
   - `"Chinese"`
 
 - `"embedding_model"`: (*Body parameter*), `string`  

docs/references/python_api_reference.md

@@ -1,5 +1,5 @@
+---
 sidebar_position: 1
-
 slug: /python_api_reference
 ---
 
@@ -58,7 +58,7 @@ A brief description of the dataset to create. Defaults to `""`.
 
 The language setting of the dataset to create. Available options:
 
-- `"English"` (Default)
+- `"English"` (default)
 - `"Chinese"`
 
 #### permission