Bump version and changelog entry

CHANGELOG.rst

@@ -6,13 +6,14 @@ All notable changes to this project will be documented in this file.
 The format is based on `Keep a Changelog`_,
 and this project adheres to `Semantic Versioning`_.
 
-Unreleased
-----------
+`2.3.1`_ – 2021-12-17
+---------------------
 
 Fixed
 ~~~~~
 
 * Small files could fail to upload to S3 storage due to MemoryFileUploadHandler
+* Corrected typos in previous changelog
 
 `2.3`_ – 2021-12-15
 -------------------
@@ -539,4 +540,5 @@ Fixed
 .. _2.1.1: https://edugit.org/AlekSIS/Official/AlekSIS/-/tags/2.1.1
 .. _2.2: https://edugit.org/AlekSIS/Official/AlekSIS/-/tags/2.2
 .. _2.2.1: https://edugit.org/AlekSIS/Official/AlekSIS/-/tags/2.2.1
-.. _2.2.1: https://edugit.org/AlekSIS/Official/AlekSIS/-/tags/2.3
+.. _2.3: https://edugit.org/AlekSIS/Official/AlekSIS/-/tags/2.3
+.. _2.3.1: https://edugit.org/AlekSIS/Official/AlekSIS/-/tags/2.3.1

pyproject.toml

 [tool.poetry]
 name = "AlekSIS-Core"
-version = "2.4.dev0"
+version = "2.3.1"
 packages = [
     { include = "aleksis" }
 ]