Ubuntu font 0.869 and old style numerals

[bartaz]

Done

• Updates to latest version of Ubuntu font
• Uses old style numerals in small caps text
• Adds utility to use old style numerals

Fixes WD-4816

QA

• Open demo
• Review updated documentation:
  • https://vanilla-framework-4812.demos.haus/docs/base/typography#old-style-numerals
  • https://vanilla-framework-4812.demos.haus/docs/base/typography#small-caps-text

[lyubomir-popov]

I recommend the term text figures, possibly with a link to wikipedia. It is the most widely used way to refer to these, and it doesn't imply being old as in "out of date".

[lyubomir-popov]

Suggested change

	Old-style numerals are a font feature that changes the appearance of numbers in text to match the height of lowercase letters. The small-caps text uses old-style numerals by default. To apply old-style numerals to other text, add the class `u-oldstyle-nums`.
	Text figures are numerals designed to echo the varying height and alignment to the baseline of lowercase text.
	### When to use:
	Text figures work better when placed within small caps headings (with the class `.p-text--small-caps`), where we've set them as the new default. Generally, they are recommended within blocks of lowercase text too, although we haven't set that as a default. To apply old-style numerals styling, add the class `u-oldstyle-nums`.
	### When not to use:
	Text figures should never be used next to uppercase text. Care should be taken in tables and other scenarios where there is a lot of numeric data.

[lyubomir-popov]

One ommission here, still says old style

[lyubomir-popov]

LGTM