Fix incorrect link for rust-lang#38622.

RELEASES.md

@@ -6154,7 +6154,7 @@ Libraries
 * [Ctrl-Z returns from `Stdin.read()` when reading from the console on
  Windows][38274]
 * [std: Fix partial writes in `LineWriter`][38062]
-* [std: Clamp max read/write sizes on Unix][38062]
+* [std: Clamp max read/write sizes on Unix][38622]
 * [Use more specific panic message for `&str` slicing errors][38066]
 * [`TcpListener::set_only_v6` is deprecated][38304]. This
  functionality cannot be achieved in std currently.
@@ -6220,7 +6220,7 @@ Compatibility Notes
 [38006]: https:/rust-lang/rust/pull/38006
 [38051]: https:/rust-lang/rust/pull/38051
 [38062]: https:/rust-lang/rust/pull/38062
-[38062]: https:/rust-lang/rust/pull/38622
+[38622]: https:/rust-lang/rust/pull/38622
 [38066]: https:/rust-lang/rust/pull/38066
 [38069]: https:/rust-lang/rust/pull/38069
 [38131]: https:/rust-lang/rust/pull/38131