Bump asciidoctorj from 2.5.5 to 2.5.6 (#425)

Bumps [asciidoctorj](https://github.com/asciidoctor/asciidoctorj) from 2.5.5 to 2.5.6.
- [Release notes](https://github.com/asciidoctor/asciidoctorj/releases)
- [Changelog](https://github.com/asciidoctor/asciidoctorj/blob/v2.5.6/CHANGELOG.adoc)
- [Commits](asciidoctor/asciidoctorj@v2.5.5...v2.5.6)

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

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

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

Author: dependabot[bot]

components/sbm-recipes-boot-upgrade/pom.xml

@@ -45,7 +45,7 @@
         <dependency>
             <groupId>org.asciidoctor</groupId>
             <artifactId>asciidoctorj</artifactId>
-            <version>2.5.5</version>
+            <version>2.5.6</version>
         </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>