Bump org.eclipse.rdf4j:rdf4j-bom from 5.1.6 to 5.2.0 in /rdf4j

Bumps [org.eclipse.rdf4j:rdf4j-bom](https://github.com/eclipse/rdf4j) from 5.1.6 to 5.2.0.
- [Release notes](https://github.com/eclipse/rdf4j/releases)
- [Commits](eclipse-rdf4j/rdf4j@5.1.6...5.2.0)

---
updated-dependencies:
- dependency-name: org.eclipse.rdf4j:rdf4j-bom
  dependency-version: 5.2.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

rdf4j/pom.xml

@@ -15,7 +15,7 @@
 
   <properties>
     <maven.compiler.release>8</maven.compiler.release>
-    <rdf4j.version>5.1.6</rdf4j.version>
+    <rdf4j.version>5.2.0</rdf4j.version>
   </properties>
 
   <dependencyManagement>