PW DE SAS Article ref to Guides variant added

ofl/playwritedesas/article/ARTICLE.en_us.html

@@ -25,6 +25,10 @@
 	Playwrite Deutschland Schulausgangschrift is a variable font with a weight
 	range from Thin (100) to Regular (400), and supports over 150 Latin-based
 	languages.
+	It has a single-weight sibling with Guides, 
+	<a href="https://fonts.google.com/specimen/Playwrite+DE+SAS+Guides">Playwrite DE SAS Guides</a>, 
+	designed to harmonize seamlessly with this main font while providing a 
+	visual aid for primary school children.
 </p>
 <p>
 	To contribute, see