docs(CHANGELOG.md): update changelog with deprecated and new methods …

…in Ecdsa class due to security vulnerability fix and enhancement

CHANGELOG.md

@@ -23,12 +23,14 @@ This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.htm
   - This can pose an attack surface, since it is easy to maliciously pick either the `+0` or the `-0` representation
   - Use `Int64.isPositiveV2()` and `Int64.modV2()` instead
   - Also deprecated `Int64.neg()` in favor of `Int64.negV2()`, for compatibility with v2 version of `Int64` that will use `Int64.checkV2()`
+- `Ecdsa.verify()` and `Ecdsa.verifySignedHash()` deprecated in favor of `Ecdsa.verifyV2()` and `Ecdsa.verifySignedHashV2()` due to a security vulnerability found in the current implementation https://github.com/o1-labs/o1js/pull/1669
 
 ## [1.3.0](https://github.com/o1-labs/o1js/compare/6a1012162...54d6545bf)
 
 ### Added
 
 - Added `base64Encode()` and `base64Decode(byteLength)` methods to the `Bytes` class. https://github.com/o1-labs/o1js/pull/1659
+- Added `Ecdsa.verifyV2()` and `Ecdsa.verifySignedHashV2` methods to the `Ecdsa` class. https://github.com/o1-labs/o1js/pull/1669
 
 ### Fixes