[DO NOT MERGE] Random broken link to test PR CI

jieyouxu · jieyouxu · commit 851cbc15ab1b · 2025-03-19T17:24:17.000+08:00
diff --git a/src/about-this-guide.md b/src/about-this-guide.md
@@ -1,5 +1,9 @@
 # About this guide
 
+Hi [TESTING DO NOT MERGE].
+
+[TESTING DO NOT MERGE]: https://www.youcannottube.com/watch?v=dQw4w9WgXcQ
+
 This guide is meant to help document how rustc – the Rust compiler – works,
 as well as to help new contributors get involved in rustc development.
 
