[css-borders-4] Editorial: fix wording for border-shape (#12958)

Author: noamr

css-borders-4/Overview.bs

@@ -3056,7 +3056,7 @@ The 'border-shape' property</h3>
 The 'border-shape' property is provided with either a single <<basic-shape>> or two <<basic-shape>>s,
 resulting in one or two paths, respectively.
 
-When two <<basic-shape>> values are given, the border is rendered between the paths generated shapes.
+When two <<basic-shape>> values are given, the border is rendered as the shape between the two paths.
 When only a single <<basic-shape>> is given, the border is rendered as a stroke with the
 [=relevant side for border shape|relevant side=]'s [=computed value|computed=] [=border width=] as the stroke width.