Add CHANGELOG entry for Coreum branding update

Author: Jon-edge

CHANGELOG.md

@@ -11,6 +11,7 @@
 - added: Register SwapKit V3 as a separate exchange plugin
 - changed: Manage tokens scene saves changes on explicit save instead of live toggling
 - changed: Unify split wallet scene titles and add chain-specific descriptions for EVM and UTXO splits
+- changed: Update Coreum display names to TX branding
 - fixed: Missing 2-factor approve / deny scene on login
 - fixed: Security check notification not reappearing after dismissal