chore: add lychee badge

Author: SWHL

README.md

@@ -1,3 +1,7 @@
 ## RapidOCR官方文档站点
 
+[![Check Links](https://github.com/lycheeverse/lychee/actions/workflows/links.yml/badge.svg)](https://github.com/RapidAI/RapidOCRDocs/blob/main/.github/workflows/links-check.yml)
+
 <https://rapidai.github.io/RapidOCRDocs/>
+
+