Bump asciidoctorj from 2.5.7 to 2.5.8

Bumps [asciidoctorj](https://github.com/asciidoctor/asciidoctorj) from 2.5.7 to 2.5.8.
- [Release notes](https://github.com/asciidoctor/asciidoctorj/releases)
- [Changelog](https://github.com/asciidoctor/asciidoctorj/blob/v2.5.8/CHANGELOG.adoc)
- [Commits](asciidoctor/asciidoctorj@v2.5.7...v2.5.8)

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

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

pom.xml

@@ -41,7 +41,7 @@
         <dependency>
             <groupId>org.asciidoctor</groupId>
             <artifactId>asciidoctorj</artifactId>
-            <version>2.5.7</version>
+            <version>2.5.8</version>
         </dependency>
         <dependency>
             <groupId>org.eclipse.jgit</groupId>