news item and release-notes if relevant for 5.3.0

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

Author: hmottestad

site/content/news/rdf4j-530.md

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+---
+title: "RDF4J 5.3.0 released"
+date: 2026-04-17T11:05:26+0200
+layout: "single"
+categories: ["news"]
+---
+RDF4J 5.3.0 is now available. This is a patch release fixing 22 bugs.
+
+For more details, have a look at the [release notes](/release-notes/5.3.0).
+<!--more-->
+### Links
+
+- [Download RDF4J](/download/)
+- [release notes](/release-notes/5.3.0).

site/content/release-notes/5.3.0.md

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+---
+title: "5.3.0"
+toc: true
+---
+RDF4J 5.3.0 is a patch release that fixes 22 issues.
+
+For a complete overview, see [all issues fixed in 5.3.0](https://github.com/eclipse/rdf4j/milestone/124?closed=1).
+
+### Acknowledgements
+
+This release was made possible by contributions from [Jerven Bolleman](https://github.com/JervenBolleman), [Piotr Sowiński](https://github.com/Ostrzyciel), [Andreas Schwarte](https://github.com/aschwarte10), [Håvard M. Ottestad](https://github.com/hmottestad), [Nikita Kozlov](https://github.com/nk2IsHere), [Christian Kleinbölting](https://github.com/seakayone).