[[https://github.com/pygments/pygments/releases/tag/2.15.0|Version 2.15.0 release of Pygments]] includes the new MediaWiki wikitext lexer from {T29828}. For Wikimedia wikis to benefit from this new functionality we need to update both #syntaxhighlight and the related #shellbox container that is used to run `pygments` in the Wikimedia production environment.
If we take this opportunity to also implement {T320848} it should be easier to keep up with future MediaWiki lexer improvements which are likely to be requested once folks can start to use the new support for highlighting wikitext code snippets on the movement wikis.
=== Rollout plan ===
[x] Deploy [[https://gerrit.wikimedia.org/r/c/mediawiki/libs/Shellbox/+/908312|shellbox container supporting both /usr/bin/pygmentize and /srv/app/pygmentize]].
** @Legoktm [[https://sal.toolforge.org/log/W6lOw4cBhuQtenzv5IPc|did this on 2023-04-27]]
[ ] Change mw-config to use /srv/app/pygmentize path
[ ] Deploy [[https://gerrit.wikimedia.org/r/c/mediawiki/libs/Shellbox/+/906133|shellbox container with Pygments 2.15.1]]