Docs on mobile do not use monospace font for code blocks, misaligning carets of improved error messages

[alexprengere]

The code blocks of the Python docs are not using a monospace font on mobile (Android + latest Chrome). For example, this misaligns the carets of the improved errors messages in the what's new.

There is a related issue on the pythondotorg repo, but if I am not mistaken the fix could be done on python-docs-theme. There is another similar issue on the devguide repo, but I think this one has been fixed and can be closed.

[alexprengere]

This is fixed now.