Bump org.asciidoctor:asciidoctor-maven-plugin from 3.0.0 to 3.1.0

Bumps [org.asciidoctor:asciidoctor-maven-plugin](https://github.com/asciidoctor/asciidoctor-maven-plugin) from 3.0.0 to 3.1.0.
- [Release notes](https://github.com/asciidoctor/asciidoctor-maven-plugin/releases)
- [Changelog](https://github.com/asciidoctor/asciidoctor-maven-plugin/blob/main/CHANGELOG.adoc)
- [Commits](https://github.com/asciidoctor/asciidoctor-maven-plugin/compare/asciidoctor-maven-tools-3.0.0...asciidoctor-maven-tools-3.1.0)

---
updated-dependencies:
- dependency-name: org.asciidoctor:asciidoctor-maven-plugin
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

spec/pom.xml

diff --git a/spec/pom.xml b/spec/pom.xml
index 23ae8c0..27d730c 100644
--- a/spec/pom.xml
+++ b/spec/pom.xml
@@ -142,7 +142,7 @@
                 <groupId>org.asciidoctor</groupId>
                 <artifactId>asciidoctor-maven-plugin</artifactId>
                 <!-- Override parent until parent is updated -->
-                <version>3.0.0</version>
+                <version>3.1.0</version>
                 <dependencies>
                     <dependency>
                         <groupId>org.jruby</groupId>