Rollup merge of #144180 - lqd:fix-typo, r=jieyouxu

fix load-bearing typo

Trying to see if this is enough to fix PR CI. How did it land without issues is a question for later.

<sub>I can see the headlines already, "billion dollar infrastructure brought down by load-bearing typo".</sub>

Author: jieyouxu

library/coretests/tests/iter/adapters/zip.rs

@@ -273,7 +273,7 @@ fn test_double_ended_zip() {
 
 #[test]
 #[cfg(panic = "unwind")]
-/// Regresion test for #137255
+/// Regression test for #137255
 /// A previous implementation of Zip TrustedRandomAccess specializations tried to do a lot of work
 /// to preserve side-effects of equalizing the iterator lengths during backwards iteration.
 /// This lead to several cases of unsoundness, twice due to being left in an inconsistent state