Update version information in readme

Author: utelle

CHANGELOG.md

@@ -7,8 +7,6 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
-## [2.0.0] - 2024-12-31
-
 ### Added
 
 - Added new cipher scheme AEGIS
@@ -565,8 +563,7 @@ The following ciphers are supported:
 - AES 256 Bit CBC - SHA1/SHA256/SHA512 HMAC ([SQLCipher](https://www.zetetic.net/sqlcipher/), database versions 1, 2, 3, and 4)
 - RC4 - No HMAC ([System.Data.SQLite](http://system.data.sqlite.org))
 
-[Unreleased]: ../../compare/v2.0.0...HEAD
-[2.0.0]: ../../compare/v1.9.2...v2.0.0
+[Unreleased]: ../../compare/v1.9.2...HEAD
 [1.9.2]: ../../compare/v1.9.1...v1.9.2
 [1.9.1]: ../../compare/v1.9.0...v1.9.1
 [1.9.0]: ../../compare/v1.8.7...v1.9.0