chore(deps): bump org.asciidoctor:asciidoctorj-pdf from 2.3.17 to 2.3.18

Bumps [org.asciidoctor:asciidoctorj-pdf](https://github.com/asciidoctor/asciidoctorj-pdf) from 2.3.17 to 2.3.18.
- [Release notes](https://github.com/asciidoctor/asciidoctorj-pdf/releases)
- [Changelog](https://github.com/asciidoctor/asciidoctorj-pdf/blob/main/CHANGELOG.adoc)
- [Commits](asciidoctor/asciidoctorj-pdf@v2.3.17...v2.3.18)

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

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

docs/pom.xml

@@ -106,7 +106,7 @@
                     <dependency>
                         <groupId>org.asciidoctor</groupId>
                         <artifactId>asciidoctorj-pdf</artifactId>
-                        <version>2.3.17</version>
+                        <version>2.3.18</version>
                     </dependency>
                 </dependencies>
             </plugin>