Help/About: Fix text wrapping on non-English locales.

In [57715], headings on the About pages were given `text-wrap: balance`. This rule causes unexpected breaks in non-latin langauges, e.g., Japanese, Korean. This fix sets the text-wrap to `pretty` for browsers that support it, and uses `balance` for English-only.

Props akshat2802, wildworks, ryelle, sabernhardt, hellofromTonya.
Fixes #60892.



git-svn-id: https://develop.svn.wordpress.org/trunk@58976 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/css/about.css

@@ -407,10 +407,14 @@
 .about__container h2,
 .about__container h3,
 .about__container h4 {
-	text-wrap: balance;
+	text-wrap: pretty;
 	color: inherit;
 }
 
+.about__container :is(h1, h2, h3, h4):lang(en) {
+	text-wrap: balance;
+}
+
 .about__container p {
 	text-wrap: pretty;
 }