doc(crypto): Add changelog entry for #4424

Author: andybalaam

crates/matrix-sdk-crypto/CHANGELOG.md

@@ -93,6 +93,12 @@ All notable changes to this project will be documented in this file.
 
 ### Refactor
 
+- Fix [#4424](https://github.com/matrix-org/matrix-rust-sdk/issues/4424) Failed
+  storage upgrade for "PreviouslyVerifiedButNoLonger". This bug caused errors to
+  occur when loading crypto information from storage, which typically prevented
+  apps from starting correctly.
+  ([#4430](https://github.com/matrix-org/matrix-rust-sdk/pull/4430))
+
 - Add new method `OlmMachine::try_decrypt_room_event`.
   ([#4116](https://github.com/matrix-org/matrix-rust-sdk/pull/4116))