refactor: remove asciidoctor-plantuml extension support#44

Baris Tanyeri (BarisTanyeri) wants to merge 2 commits intomainphilips-software/antora-site-action:mainfrom

feature/deprecate-asciidoctor-plantumlphilips-software/antora-site-action:feature/deprecate-asciidoctor-plantumlCopy head branch name to clipboard