Update scroll-animations-1/Overview.bs

Co-authored-by: fantasai <fantasai.bugs@inkedblade.net>

Author: flackr

scroll-animations-1/Overview.bs

@@ -481,9 +481,11 @@ spec: cssom-view-1; type: dfn;
 	but [=relative positioning|relative=] and [=absolute positioning|absolute=] positioning
 	are accounted for.
 
-	Note: For [=sticky-positioned boxes=] a given constraint may be satisfied over
-	a range of scroll positions. Each of the ranges clarifies whether to use the earliest
-	or latest position.
+	Note: For [=sticky-positioned boxes=]
+	the 0% and 100% progress conditions can sometimes be satisfied
+	by a range of scroll positions rather than just one.
+	Each range therefore indicates whether to use
+	the earliest or latest qualifying position.
 
 	[[CSS-POSITION-3]] [[CSS-TRANSFORMS-1]]