Add text-wrap: balance to theme styles

[superpoincare]

Chrome 114 has introduced "text-wrap:balance" for CSS.

The importance of it is explained in: ​https://developer.chrome.com/en/blog/new-in-chrome-114/

This helps in displaying content more evenly and often required for headings such as site title and description below it.

So WordPress themes should have it.

[sabernhardt]

I just mentioned this as a possibility in Twenty Twenty-Four:
​https://github.com/WordPress/twentytwentyfour/issues/479