Update changelog

Author: kean

CHANGELOG.md

@@ -1,5 +1,11 @@
 # Pulse 4.x
 
+## Pulse 4.2.6
+
+*Jun 22, 2024*
+
+- Disable Swift 6 compatibility in Swift package to ensure Pulse compiles if added as a dependency under Xcode 16 by @NachoSoto in https://github.com/kean/Pulse/pull/264
+- Fix some of the Swift 6 errors
 - (Internal) Move `Identifable` conformances to `Pulse` to remove the "retroactive" conformance warnings in Swift 6 
 
 ## Pulse 4.2.5