news item and release-notes if relevant for 5.2.0

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

Author: hmottestad

site/content/news/rdf4j-520.md

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+---
+title: "RDF4J 5.2.0 released"
+date: 2025-10-05T16:48:42+0200
+layout: "single"
+categories: ["news"]
+---
+RDF4J 5.2.0 is now available. This is a patch release fixing 9 bugs.
+
+For more details, have a look at the [release notes](/release-notes/5.2.0).
+<!--more-->
+### Links
+
+- [Download RDF4J](/download/)
+- [release notes](/release-notes/5.2.0).

site/content/release-notes/5.2.0.md

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+---
+title: "5.2.0"
+toc: true
+---
+RDF4J 5.2.0 is a patch release that fixes 9 issues.
+
+For a complete overview, see [all issues fixed in 5.2.0](https://github.com/eclipse/rdf4j/milestone/115?closed=1).
+
+### Acknowledgements
+
+This release was made possible by contributions from [Antoine Willerval](https://github.com/ate47), [Benji Herber](https://github.com/benherber), [Håvard M. Ottestad](https://github.com/hmottestad), [kenwenzel](https://github.com/kenwenzel), [Linn Aung](https://github.com/linnaung), [Chengxu Bian](https://github.com/odysa).