var(--bs-font-size-base) is not defined. Setting the 'md' font size has no effect.

[nextgenthemes]

Prerequisites

• I have searched for duplicate or closed issues
• I have validated any HTML to avoid common problems
• I have read the contributing guidelines

Describe the issue

It appears only three times in the sources, trying to change the md font site by changing the sass map for font sizes fails.

@use "~bootstrap/scss/config" with (
	$font-sizes: (

Seems this should be --bs-font-size-md instead

Reduced test cases

1. Go to https://v6-dev--twbs-bootstrap.netlify.app/docs/6.0/components/nav-overflow/#with-disabled-items
2. Check DevTools for --bs-font-size-base

What operating system(s) are you seeing the problem on?

Linux

What browser(s) are you seeing the problem on?

No response

What version of Bootstrap are you using?

v6-dev