Bump net.sourceforge.plantuml:plantuml in /hipparchus-parent

Bumps [net.sourceforge.plantuml:plantuml](https://github.com/plantuml/plantuml) from 1.2025.2 to 1.2026.0.
- [Release notes](https://github.com/plantuml/plantuml/releases)
- [Changelog](https://github.com/plantuml/plantuml/blob/master/CHANGES.md)
- [Commits](plantuml/plantuml@v1.2025.2...v1.2026.0)

---
updated-dependencies:
- dependency-name: net.sourceforge.plantuml:plantuml
  dependency-version: 1.2026.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

hipparchus-parent/pom.xml

@@ -551,7 +551,7 @@
     <hipparchus.maven-jar-plugin.version>3.4.2</hipparchus.maven-jar-plugin.version>
     <hipparchus.maven-jxr-plugin.version>3.6.0</hipparchus.maven-jxr-plugin.version>
     <hipparchus.plantuml-maven-plugin.version>1.2</hipparchus.plantuml-maven-plugin.version>
-    <hipparchus.plantuml.version>1.2025.2</hipparchus.plantuml.version>
+    <hipparchus.plantuml.version>1.2026.0</hipparchus.plantuml.version>
     <hipparchus.maven-pmd-plugin.version>3.24.0</hipparchus.maven-pmd-plugin.version>
     <hipparchus.maven-resources-plugin.version>3.3.1</hipparchus.maven-resources-plugin.version>
     <hipparchus.maven-site-plugin.version>3.12.1</hipparchus.maven-site-plugin.version>