[css-text-4] Fix typo in text-wrap section

Replace `text-wrap: none` with `text-wrap: nowrap`

Author: nt1m

css-text-4/Overview.bs

@@ -5842,7 +5842,7 @@ Text Wrap Settings: the 'text-wrap' property</h3>
 	line-breaking behavior defined
 	for the BK, CR, LF, CM, NL, and SG line breaking classes
 	in [[!UAX14]] must be honored.
-	Additionally, if wrapping is allowed (i.e. 'text-wrap' is not ''text-wrap/none''),
+	Additionally, if wrapping is allowed (i.e. 'text-wrap' is not ''text-wrap/nowrap''),
 	line breaking behavior defined
 	for the WJ, ZW, and GL line-breaking classes
 	in [[!UAX14]] must be honored.