Ping notriddle when a clippy lint in clippy_lints/doc is modified (#15147)

Related to [this Zulip
thread](https://rust-lang.zulipchat.com/#narrow/channel/257328-clippy/topic/Reviewing.20the.20.60doc.60.20lints/with/525943439).

@notriddle Would you want that?

changelog: none

Author: flip1995

triagebot.toml

@@ -17,6 +17,9 @@ allow-unauthenticated = [
 
 [issue-links]
 
+[mentions."clippy_lints/src/doc"]
+cc = ["@notriddle"]
+
 # Prevents mentions in commits to avoid users being spammed
 [no-mentions]