Don't use '，' (U+FF0C) but ', ' (U+2C U+20) (#8063)

The Unicode codepoint '，' (U+FF0C) is meant to be used in Chinese text,
but this is English text. It looks like a comma followed by a space, but
isn't. Of course I didn't change actual Chinese text.

### What problem does this PR solve?

Mixup of Unicode characters. This is probably unnoticed by most users,
but I wonder if screen readers would read it out differently or if LLMs
would trip up on it.

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)
- [ ] New Feature (non-breaking change which adds functionality)
- [x] Documentation Update
- [ ] Refactoring
- [ ] Performance Improvement
- [ ] Other (please describe):

web/src/interfaces/request/base.ts

@@ -1,7 +1,7 @@
 export interface IPaginationRequestBody {
   keywords?: string;
   page?: number;
-  page_size?: number; // name|create|doc_num|create_time|update_time，default：create_time
+  page_size?: number; // name|create|doc_num|create_time|update_time, default：create_time
   orderby?: string;
   desc?: string;
 }