Update quickstart.mdx (#2084)

### What problem does this PR solve?

[minor] Fixed a docusaurus display issue.

### Type of change

- [x] Documentation Update

docs/quickstart.mdx

@@ -298,7 +298,7 @@ Once you have selected an embedding model and used it to parse a file, you are n
 
    _When the file parsing completes, its parsing status changes to **SUCCESS**._
 
-:::alert NOTE 
+:::caution NOTE 
 - If your file parsing gets stuck at below 1%, see [FAQ 4.3](https://ragflow.io/docs/dev/faq#43-why-does-my-document-parsing-stall-at-under-one-percent). 
 - If your file parsing gets stuck at near completion, see [FAQ 4.4](https://ragflow.io/docs/dev/faq#44-why-does-my-pdf-parsing-stall-near-completion-while-the-log-does-not-show-any-error)
 :::