Update changelog

Also fix missing internal changelog links

Author: Araneidae

CHANGELOG.rst

@@ -3,12 +3,18 @@ Changelog
 
 All notable changes to this project will be documented in this file.
 
-The format is based on `Keep a Changelog <https://keepachangelog.com/en/1.0.0/>`_,
-and this project adheres to `Semantic Versioning <https://semver.org/spec/v2.0.0.html>`_.
+The format is based on `Keep a Changelog
+<https://keepachangelog.com/en/1.0.0/>`_, and this project adheres to `Semantic
+Versioning <https://semver.org/spec/v2.0.0.html>`_.
 
-4.0.1_ - 2022-02-14
+Unreleased_
 -----------
 
+- `Improve handling of range settings for scalar records <../../pull/82>`_
+
+4.0.1_ - 2022-02-14
+-------------------
+
 Removed:
 
 - `Remove python2 support <../../pull/64>`_
@@ -121,7 +127,9 @@ Added:
 Last release as an EPICS module rather than a Python package
 
 
-.. _Unreleased: https://github.com/dls-controls/pythonIoc/compare/3.2...HEAD
+.. _Unreleased: https://github.com/dls-controls/pythonIoc/compare/4.0.1...HEAD
+.. _4.0.1: https://github.com/dls-controls/pythonIoc/compare/3.2.1...4.0.1
+.. _3.2.1: https://github.com/dls-controls/pythonIoc/compare/3.2...3.2.1
 .. _3.2: https://github.com/dls-controls/pythonIoc/compare/3.1...3.2
 .. _3.1: https://github.com/dls-controls/pythonIoc/compare/3.0...3.1
 .. _3.0: https://github.com/dls-controls/pythonIoc/compare/3.0b2...3.0