fix: markdown-it-attrs behaviour in pre wrapper plugin#3519

LiamEderzeel wants to merge 3 commits intovuejs:mainvuejs/vitepress:mainfrom

LiamEderzeel:fix/markdown-it-attr-behaviour-in-pre-wrapper-pluginLiamEderzeel/vitepress:fix/markdown-it-attr-behaviour-in-pre-wrapper-pluginCopy head branch name to clipboard