Release the patch release

Author: vmcj

Diff for: ChangeLog

@@ -1,5 +1,8 @@
 DOMjudge Programming Contest Judging System
 
+Version 8.3.1 - 21 July 2024
+ - Create autoload_runtime.php as normal user to prevent a composer warning.
+
 Version 8.3.0 - 31 May 2024
 ---------------------------
  - [security] Close metadata file descriptor for the child in runguard.

Diff for: README.md

@@ -6,7 +6,7 @@ DOMjudge
 [![Coverity Scan Status](https://img.shields.io/coverity/scan/671.svg)](https://scan.coverity.com/projects/domjudge)
 [![CodeQL alerts](https://github.com/DOMjudge/domjudge/actions/workflows/codeql-analysis.yml/badge.svg?branch=main&event=push)](https://github.com/DOMjudge/domjudge/actions/workflows/codeql-analysis.yml)
 
-This is the Programming Contest Jury System "DOMjudge" version 8.3.0
+This is the Programming Contest Jury System "DOMjudge" version 8.3.1
 
 DOMjudge is a system for running a programming contest, like the
 ICPC regional and world championship programming contests.