build(deps): bump org.asciidoctor:asciidoctorj-diagram

Bumps [org.asciidoctor:asciidoctorj-diagram](https://github.com/asciidoctor/asciidoctorj-diagram) from 2.3.1 to 3.2.1.
- [Release notes](https://github.com/asciidoctor/asciidoctorj-diagram/releases)
- [Commits](asciidoctor/asciidoctorj-diagram@v2.3.1...v3.2.1)

---
updated-dependencies:
- dependency-name: org.asciidoctor:asciidoctorj-diagram
  dependency-version: 3.2.1
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

docs/pom.xml

@@ -18,7 +18,7 @@
     <properties>
         <asciidoctor.maven.plugin.version>3.2.0</asciidoctor.maven.plugin.version>
         <asciidoctorj.version>3.0.1</asciidoctorj.version>
-        <asciidoctorj-diagram.version>2.3.1</asciidoctorj-diagram.version>
+        <asciidoctorj-diagram.version>3.2.1</asciidoctorj-diagram.version>
         <jruby.version>10.0.4.0</jruby.version>
     </properties>