DOC: Added a UI tip for document parsing (#7430)

### What problem does this PR solve?

### Type of change

- [x] Documentation Update

web/src/locales/en.ts

@@ -106,6 +106,7 @@ export default {
       disabled: 'Disable',
       action: 'Action',
       parsingStatus: 'Parsing Status',
+      parsingStatusTip: 'Document parsing time varies based on several factors. Enabling features like Knowledge Graph, RAPTOR, Auto Question Extraction, or Auto Keyword Extraction will significantly increase processing time. If the progress bar stalls, please consult these two FAQs: https://ragflow.io/docs/dev/faq#why-does-my-document-parsing-stall-at-under-one-percent.',
       processBeginAt: 'Begin at',
       processDuration: 'Duration',
       progressMsg: 'Progress',