typo fo => for (w3c#5074)

Author: amundo

css-scroll-snap-1/Overview.bs

@@ -216,7 +216,7 @@ Motivating Examples {#examples}
 Scroll Snap Model {#overview}
 =============================
 
-    This module defines controls fo
+    This module defines controls for
     <dfn lt="scroll snap position" local-lt="snap position">scroll snap positions</dfn>,
     which are scroll positions that produce particular alignments
     of content within a scroll container.