Update restructured text in th changelog

CHANGELOG.rst

@@ -7,7 +7,7 @@ The format is based on `Keep a Changelog`_,
 and this project adheres to `Semantic Versioning`_.
 
 `2.0b0`_ - 2021-05-21
------------------------
+---------------------
 
 Added
 ~~~~~
@@ -30,7 +30,7 @@ Fixed
 * The Hjelp icon inside the menu changed it's name and was therefore displayed incorrectly.
 
 `2.0a2`_ - 2020-05-04
------------------------
+---------------------
 
 Added
 ~~~~~
@@ -40,9 +40,9 @@ Added
 * Frequently asked questions
 * Report issues
 
-----------
-_Keep a Changelog: https://keepachangelog.com/en/1.0.0/
-_Semantic Versioning: https://semver.org/spec/v2.0.0.html
 
-_2.0a2: https://edugit.org/AlekSIS/Official/AlekSIS-App-Hjelp/-/tags/2.0a2
-_2.0b0: https://edugit.org/AlekSIS/Official/AlekSIS-App-Hjelp/-/tags/2.0b0
+.. _Keep a Changelog: https://keepachangelog.com/en/1.0.0/
+.. _Semantic Versioning: https://semver.org/spec/v2.0.0.html
+
+.. _2.0a2: https://edugit.org/AlekSIS/Official/AlekSIS-App-Hjelp/-/tags/2.0a2
+.. _2.0b0: https://edugit.org/AlekSIS/Official/AlekSIS-App-Hjelp/-/tags/2.0b0