chore: update CHANGELOG with a fix

Add note about `IovDeque` fix for non 4K pages.

Signed-off-by: Egor Lazarchuk <[email protected]>

Author: ShadowCurse

CHANGELOG.md

@@ -29,6 +29,9 @@ and this project adheres to
 
 ### Fixed
 
+- [#5222](https://github.com/firecracker-microvm/firecracker/pull/5222): Fixed
+  network and rng devices locking up on hosts with non 4K pages.
+
 ## [1.12.0]
 
 ### Added