docs: add 0.12.2 release to CHANGELOG

Author: cpu

CHANGELOG.md

@@ -24,6 +24,14 @@ only cryptographic provider.
   and can be used to write any generated alerts to the connection to signal
   the accept error to the peer.
 
+* The experimental cargo-c build support has been updated to use a vendored
+  header file. This avoids the need for nightly rust or `cbindgen` when using
+  this build method.
+
+## 0.12.2 (2024-03-28)
+
+### Changed
+
 * The experimental cargo-c build support has been updated to use a vendored
   header file. This avoids the need for nightly rust or `cbindgen` when using
   this build method.