Bump org.jruby:jruby from 9.4.12.0 to 9.4.12.1 in /fj-doc-guide

Bumps org.jruby:jruby from 9.4.12.0 to 9.4.12.1.

---
updated-dependencies:
- dependency-name: org.jruby:jruby
  dependency-version: 9.4.12.1
  dependency-type: direct:production
...

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

Author: dependabot[bot]

fj-doc-guide/pom.xml

@@ -29,7 +29,7 @@
 		<asciidoctorj.diagram.version>2.3.2</asciidoctorj.diagram.version>
 		<asciidoctorj.diagram-plantuml.version>1.2025.2</asciidoctorj.diagram-plantuml.version>
 		<asciidoctorj.diagram-ditaamini.version>1.0.3</asciidoctorj.diagram-ditaamini.version>
-		<jruby.version>9.4.12.0</jruby.version>
+		<jruby.version>9.4.12.1</jruby.version>
 		<maven.build.timestamp.format>yyyy-MM-dd'T'HH:mm:ss'Z'</maven.build.timestamp.format>
 		<pdf-output-folder>${project.build.directory}/generated-pdf</pdf-output-folder>
 		<html-output-folder>${project.build.directory}/generated-html5</html-output-folder>