Fix text-pretty description (#2210)

Current `text-pretty` description says,

> Use the `text-pretty` utility to prevent orphans (a single word on its
own line) at the end of a text block:

See [this recent blog post from Webkit about `text-wrap:
pretty;`](https://webkit.org/blog/16547/better-typography-with-text-wrap-pretty/)
and in particular,

> Because of the way Chrome’s implementation of pretty has been taught,
a lot of web developers expect this value is only supposed to prevent
short last lines. But that was never the intention. In fact, the CSS
Working Group defined a different value for such a purpose. It was [just
renamed](w3c/csswg-drafts#11283) last week to
`text-wrap: avoid-short-last-lines`.

So it seems an updated description is needed and this PR has a first
attempt.

---------

Co-authored-by: Jordan Pittman <[email protected]>
Co-authored-by: Philipp Spiess <[email protected]>

Author: 3 people

src/docs/text-wrap.mdx

@@ -111,7 +111,7 @@ For performance reasons browsers limit text balancing to blocks that are ~6 line
 
 ### Pretty text wrapping
 
-Use the `text-pretty` utility to prevent orphans (a single word on its own line) at the end of a text block:
+Use the `text-pretty` utility to prefer better text wrapping and layout at the expense of speed. Behavior varies across browsers but often involves approaches like preventing orphans (a single word on its own line) at the end of a text block:
 
 <Figure>