Update CHANGELOG.md

Author: errfrom

CHANGELOG.md

@@ -7,82 +7,90 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
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-- [[v9.3.1]](#v931)
+- [[Unreleased]](#unreleased)
   - [Fixed](#fixed)
-- [[v9.3.0]](#v930)
+- [[v9.3.1]](#v931)
   - [Fixed](#fixed-1)
+- [[v9.3.0]](#v930)
+  - [Fixed](#fixed-2)
   - [Changed](#changed)
 - [[v9.2.0]](#v920)
   - [Added](#added)
   - [Changed](#changed-1)
   - [Removed](#removed)
-  - [Fixed](#fixed-2)
+  - [Fixed](#fixed-3)
 - [[v9.1.0]](#v910)
   - [Added](#added-1)
-  - [Changed](#changed-2
+  - [Changed](#changed-2)
   - [Removed](#removed-1)
-  - [Fixed](#fixed-3)
+  - [Fixed](#fixed-4)
 - [[v9.0.0]](#v900)
   - [Deprecated](#deprecated)
   - [Added](#added-2)
   - [Removed](#removed-2)
   - [Changed](#changed-3)
-  - [Fixed](#fixed-4)
+  - [Fixed](#fixed-5)
 - [[v8.0.0]](#v800)
   - [Added](#added-3)
   - [Changed](#changed-4)
-  - [Fixed](#fixed-5)
+  - [Fixed](#fixed-6)
   - [Removed](#removed-3)
 - [[v7.0.0]](#v700)
   - [Added](#added-4)
   - [Changed](#changed-5)
-  - [Fixed](#fixed-6)
+  - [Fixed](#fixed-7)
   - [Removed](#removed-4)
 - [[v6.0.0]](#v600)
   - [Added](#added-5)
   - [Changed](#changed-6)
-  - [Fixed](#fixed-7)
+  - [Fixed](#fixed-8)
   - [Removed](#removed-5)
 - [[v5.0.0]](#v500)
   - [Added](#added-6)
   - [Changed](#changed-7)
   - [Removed](#removed-6)
-  - [Fixed](#fixed-8)
+  - [Fixed](#fixed-9)
   - [Runtime Dependencies](#runtime-dependencies)
 - [[v4.0.2] - 2023-01-17](#v402---2023-01-17)
-  - [Fixed](#fixed-9)
+  - [Fixed](#fixed-10)
 - [[v4.0.1] - 2022-12-20](#v401---2022-12-20)
   - [Added](#added-7)
 - [[v4.0.0] - 2022-12-15](#v400---2022-12-15)
   - [Added](#added-8)
   - [Changed](#changed-8)
   - [Removed](#removed-7)
-  - [Fixed](#fixed-10)
+  - [Fixed](#fixed-11)
   - [Runtime Dependencies](#runtime-dependencies-1)
 - [[3.0.0] - 2022-11-21](#300---2022-11-21)
   - [Added](#added-9)
   - [Changed](#changed-9)
   - [Removed](#removed-8)
-  - [Fixed](#fixed-11)
+  - [Fixed](#fixed-12)
   - [Runtime Dependencies](#runtime-dependencies-2)
 - [[2.0.0] - 2022-09-12](#200---2022-09-12)
   - [Added](#added-10)
   - [Changed](#changed-10)
   - [Removed](#removed-9)
-  - [Fixed](#fixed-12)
+  - [Fixed](#fixed-13)
 - [[2.0.0-alpha] - 2022-07-05](#200-alpha---2022-07-05)
   - [Added](#added-11)
   - [Removed](#removed-10)
   - [Changed](#changed-11)
-  - [Fixed](#fixed-13)
-- [[1.1.0] - 2022-06-30](#110---2022-06-30)
   - [Fixed](#fixed-14)
-- [[1.0.1] - 2022-06-17](#101---2022-06-17)
+- [[1.1.0] - 2022-06-30](#110---2022-06-30)
   - [Fixed](#fixed-15)
+- [[1.0.1] - 2022-06-17](#101---2022-06-17)
+  - [Fixed](#fixed-16)
 - [[1.0.0] - 2022-06-10](#100---2022-06-10)
 
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+## [Unreleased]
+
+### Fixed
+
+- Fixed transaction witness set 'attach' functions. Previously, the updated witness set was incorrectly appended to the existing set, causing performance degradation when processing constraints for complex transactions. ([#1653](https://github.com/Plutonomicon/cardano-transaction-lib/pull/1653))
+
 ## [v9.3.1]
 
 ### Fixed