fix(deps): update dependency org.asciidoctor:asciidoctorj to v2.5.12

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
org.asciidoctor:asciidoctorj	2.5.11 -> 2.5.12

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Release Notes

asciidoctor/asciidoctorj (org.asciidoctor:asciidoctorj)

### [`v2.5.12`](https://togithub.com/asciidoctor/asciidoctorj/releases/tag/v2.5.12) [Compare Source](https://togithub.com/asciidoctor/asciidoctorj/compare/v2.5.11...v2.5.12) **Improvements**: - Add Reader.getSource() and Reader.getSourceLines() ([#​1262](https://togithub.com/asciidoctor/asciidoctorj/issues/1262)) - Upgrade to asciidoctor 2.0.22 ([#​1268](https://togithub.com/asciidoctor/asciidoctorj/issues/1268)) - Upgrade to JRuby 9.4.6.0 ([#​1267](https://togithub.com/asciidoctor/asciidoctorj/issues/1267)) - Upgrade to asciidoctorj-pdf 2.3.14 ([#​1268](https://togithub.com/asciidoctor/asciidoctorj/issues/1268)) - Upgrade to asciidoctorj-diagram 2.3.0 ([#​1267](https://togithub.com/asciidoctor/asciidoctorj/issues/1267)) - Upgrade to asciidoctorj-diagram-plantuml 1.2024.3 ([#​1267](https://togithub.com/asciidoctor/asciidoctorj/issues/1267)) - Upgrade to asciidoctorj-reveal.js 5.1.0 ([#​1267](https://togithub.com/asciidoctor/asciidoctorj/issues/1267)) - Upgrade to asciidoctorj-epub3.js 2.1.0 ([#​1268](https://togithub.com/asciidoctor/asciidoctorj/issues/1268))

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