Enable Kroki on reStructuredText and Textile documents

resolves https://gitlab.com/gitlab-org/gitlab/-/issues/324766

changelogs/unreleased/issue-324766-kroki-filter-all-markup.yml

+---
+title: Enable Kroki on reStructuredText and Textile documents
+merge_request: 60780
+author: Guillaume Grossetie
+type: added

lib/banzai/pipeline/markup_pipeline.rb

@@ -9,7 +9,8 @@ module Banzai
           Filter::AssetProxyFilter,
           Filter::ExternalLinkFilter,
           Filter::PlantumlFilter,
-          Filter::SyntaxHighlightFilter
+          Filter::SyntaxHighlightFilter,
+          Filter::KrokiFilter
         ]
       end