[css-scrollbars] Update acknowledgement section

Author: frivoal

css-scrollbars-1/Overview.bs

@@ -444,15 +444,37 @@ Appendix A. Acknowledgments</h2>
 
 	This appendix is <em>non-normative</em>.
 
+	<p>The CSS Working Group and the Editors of this specification
+	would like to express our gratitude to the following people,
+	as this specification would not have been possible without their feedback and contributions:
+	Chris Lilley,
+	Emilio Cobos Álvarez,
+	Eric Shepherd,
+	Eric Willigers,
+	fantasai,
+	Greg Whitworth,
+	jonjohnjohnson,
+	L. David Baron,
+	Luke Warlow,
+	Oriol Brufau,
+	Patrick H. Lauke,
+	Rene Haas,
+	Rick Byers,
+	Simon Fraser,
+	Tab Atkins Jr.,
+	Xidorn Quan.
+
 	<p>
-	Thanks to the use-cases, prototyping, implementation, and feedback from
+	In particular,
+	thanks for the use-cases, prototyping, implementation, and feedback from
 	<a class="h-card" href="https://xanthir.com/">Tab Atkins</a> and
 	<a class="h-card" href="https://www.upsuper.org/">Xidorn Quan</a>.
-	Thanks to accessibility review and contributions
+	Thanks for accessibility review and contributions
 	(<a href="https://github.com/w3c/csswg-drafts/issues/3315">#3315</a>)
 	from
 	<a class="h-card" href="https://www.splintered.co.uk">Patrick H. Lauke</a>.
 
+
 <h2 class="no-num" id="changes">
 Appendix B. Changes</h2>