Bump org.asciidoctor:asciidoctorj in /quarkus-workshop-super-heroes

Bumps [org.asciidoctor:asciidoctorj](https://github.com/asciidoctor/asciidoctorj) from 2.5.10 to 2.5.12.
- [Release notes](https://github.com/asciidoctor/asciidoctorj/releases)
- [Changelog](https://github.com/asciidoctor/asciidoctorj/blob/v2.5.12/CHANGELOG.adoc)
- [Commits](asciidoctor/asciidoctorj@v2.5.10...v2.5.12)

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

Signed-off-by: dependabot[bot] <[email protected]>

quarkus-workshop-super-heroes/docs/pom.xml

@@ -34,7 +34,7 @@ The default build will take around 50m.
     <properties>
         <version.asciidoctor.maven.plugin>2.2.4</version.asciidoctor.maven.plugin>
         <version.jruby>9.4.5.0</version.jruby>
-        <version.asciidoctorj>2.5.10</version.asciidoctorj>
+        <version.asciidoctorj>2.5.12</version.asciidoctorj>
         <version.asciidoctorj.pdf>2.3.9</version.asciidoctorj.pdf>
         <version.asciidoctorj.diagram>2.2.13</version.asciidoctorj.diagram>
         <!-- If building docs locally and urls matter, set environment variables for these values -->