Update changelog

Author: jonasbb

serde_with/CHANGELOG.md

@@ -17,6 +17,11 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 * Bump MSRV to 1.64, since that is required for the indexmap v2 dependency.
 
+### Fixed
+
+* Prevent panics when deserializing `i64::MIN` using `TimestampSeconds<i64>` (#632, #633)
+    Thanks to @hollmmax for reporting and fixing the issue.
+
 ## [3.1.0] - 2023-07-17
 
 ### Added

serde_with_macros/CHANGELOG.md

@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ## [Unreleased]
 
+No changes.
+
 ## [3.1.0] - 2023-07-17
 
 No changes.