Issue description

There is a bug identified here KaTeX/KaTeX#4093 (comment) that breaks rendering of Katex code

I have seen multiple instances where Congo fails to properly interpret Katex syntax e.g this Katex official permalink is not rendered as block or inline

Theme version

stable

Hugo version

hugo v0.148.2-40c3d8233d4b123eff74725e5766fc6272f0a84d+extended linux/arm64 BuildDate=2025-07-27T12:43:24Z VendorInfo=gohugoio

Which browser rendering engines are you seeing the problem on?

Firefox (Mozilla Firefox)

URL to sample repository or website

No response

Hugo output or build error messages

no error