Syntax highlighting in markdown card not working in example

[farmio]

Checklist

• I have updated to the latest available Home Assistant version.
• I have cleared the cache of my browser.
• I have tried a different browser to see if it is related to my browser.
• I have tried reproducing the issue in safe mode to rule out problems with unsupported custom resources.

Describe the issue you are experiencing

The syntax highlighting feature of the markdown card seems to be broken. See https://design.home-assistant.io/#lovelace/markdown-card

I did try Safari and Chrome.

Describe the behavior you expected

Syntax highlighting should be visible in example site.

Steps to reproduce the issue

...

What version of Home Assistant Core has the issue?

core-2024.5

What was the last working version of Home Assistant Core?

No response

In which browser are you experiencing the issue with?

No response

Which operating system are you using to run this browser?

No response

State of relevant entities

No response

Problem-relevant frontend configuration

No response

Javascript errors shown in your browser console/inspector

No response

Additional information

No response