Update CHANGELOG to display the change in behavior for MariaDB/MySQL UPDATE

Signed-off-by: Soblow "Opale" Xaselgio <[email protected]>

Author: Soblow

CHANGELOG.md

@@ -7,6 +7,7 @@ for Rust libraries in [RFC #1105](https://github.com/rust-lang/rfcs/blob/master/
 ## [Unreleased]
 
 * Added type `diesel_async::pooled_connection::mobc::PooledConnection`
+* MySQL/MariaDB now use `CLIENT_FOUND_ROWS` capability to allow consistent behavior with PostgreSQL regarding return value of UPDATe commands.
 
 ## [0.4.1] - 2023-09-01