Bump org.asciidoctor:asciidoctorj-diagram-plantuml (#84)

Bumps [org.asciidoctor:asciidoctorj-diagram-plantuml](https://github.com/asciidoctor/asciidoctorj-diagram) from 1.2025.3 to 1.2026.2.
- [Release notes](https://github.com/asciidoctor/asciidoctorj-diagram/releases)
- [Commits](https://github.com/asciidoctor/asciidoctorj-diagram/commits)

---
updated-dependencies:
- dependency-name: org.asciidoctor:asciidoctorj-diagram-plantuml
  dependency-version: 1.2026.2
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

pom.xml

@@ -34,7 +34,7 @@
         <maven.version>3.9.14</maven.version>
         <asciidoctorj.version>3.0.1</asciidoctorj.version>
         <asciidoctorj.diagram.version>3.2.1</asciidoctorj.diagram.version>
-        <asciidoctorj.diagram.plantuml.version>1.2025.3</asciidoctorj.diagram.plantuml.version>
+        <asciidoctorj.diagram.plantuml.version>1.2026.2</asciidoctorj.diagram.plantuml.version>
         <asciidoctorj.diagram.ditaamini.version>1.0.3</asciidoctorj.diagram.ditaamini.version>
         <jackson.version>3.1.0</jackson.version>
         <maven.plugin.tools.version>3.15.2</maven.plugin.tools.version>