Improve changelog for ECDSA verify fix
Bugfix
- * Fix ECDSA verification, where it was failing to validate the public key
- for signatures where R == 1 and S == 1. This bug meant that it was
- possible to verify such signatures with an invalid public key, in some
- cases.
+ * Fix ECDSA verification, where it was not always validating the
+ public key. This bug meant that it was possible to verify a
+ signature with an invalid public key, in some cases. Reported by
+ Guido Vranken in #4420.
