Updated conversation_api.md document/upload (#787)

### What problem does this PR solve?

Updated conversation_api.md document/upload parameter description

### Type of change

- [x] Documentation Update

docs/conversation_api.md

 
 ### Parameter:
 
-| name    | type   | optional | description                            |
-|---------|--------|----------|----------------------------------------|
-| file    | file   | No       | Upload file.                           |
-| kb_name | string | No       | Choose the upload knowledge base name. |
+| name      | type   | optional | description                                             |
+|-----------|--------|----------|---------------------------------------------------------|
+| file      | file   | No       | Upload file.                                            |
+| kb_name   | string | No       | Choose the upload knowledge base name.                  |
+| parser_id | string | Yes      | Choose the parsing method.                              |
+| run       | string | Yes      | Parsing will start automatically when the value is "1". |
 
 ### Response 
 ```json