Add 2023.05 changelog

Changelog.md

@@ -1,3 +1,12 @@
+## 2023.05 Update
+1. Archive manager optimization
+2. A series of catchain (basic consensus protocol) security improvements
+3. Update for Fift libraries and FunC: better error-handling, fixes for `catch` stack recovery
+4. A series of out message queue handling optimization (already deployed during emergency upgrades between releases)
+5. Improvement of binaries portability
+
+Besides the work of the core team, this update is based on the efforts of @aleksej-paschenko (portability improvement), [Disintar team](https://github.com/disintar/) (archive manager optimization) and [sec3-service](https://github.com/sec3-service) security auditors (funC improvements).
+
 ## 2023.04 Update
 1. CPU load optimization: previous DHT reconnect policy was too aggressive
 2. Network throughput improvements: granular control on external message broadcast, optimize celldb GC, adjust state serialization and block downloading timings, rldp2 for states and archives 

recent_changelog.md

@@ -1,6 +1,8 @@
-## 03.2023 Update
-1. Improvement of ADNL connection stability
-2. Transaction emulator support and getAccountStateByTransaction method
-3. Fixes of typos, undefined behavior and timer warnings
-4. Handling incorrect integer literal values in funC; funC version bumped to 0.4.2
-5. FunC Mathlib
+## 2023.05 Update
+1. Archive manager optimization
+2. A series of catchain (basic consensus protocol) security improvements
+3. Update for Fift libraries and FunC: better error-handling, fixes for `catch` stack recovery
+4. A series of out message queue handling optimization (already deployed during emergency upgrades between releases)
+5. Improvement of binaries portability
+
+Besides the work of the core team, this update is based on the efforts of @aleksej-paschenko (portability improvement), [Disintar team](https://github.com/disintar/) (archive manager optimization) and [sec3-service](https://github.com/sec3-service) security auditors (funC improvements).