news item and release-notes if relevant for 5.3.1

Signed-off-by: Håvard Ottestad <hmottestad@gmail.com>

Author: hmottestad

site/content/news/rdf4j-531.md

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+---
+title: "RDF4J 5.3.1 released"
+date: 2026-04-23T21:24:25+0200
+layout: "single"
+categories: ["news"]
+---
+RDF4J 5.3.1 is now available. This is a patch release fixing 2 bugs.
+
+For more details, have a look at the [release notes](/release-notes/5.3.1).
+<!--more-->
+### Links
+
+- [Download RDF4J](/download/)
+- [release notes](/release-notes/5.3.1).

site/content/release-notes/5.3.1.md

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+---
+title: "5.3.1"
+toc: true
+---
+RDF4J 5.3.1 is a patch release that fixes 2 issues.
+
+For a complete overview, see [all issues fixed in 5.3.1](https://github.com/eclipse/rdf4j/milestone/129?closed=1).
+
+### Acknowledgements
+
+This release was made possible by contributions from [Håvard M. Ottestad](https://github.com/hmottestad).