Fix a broken link

Author: zcorpan

scroll-customization-api/UseCases.md

@@ -1,5 +1,5 @@
 
-The [Composited Scrolling](https://github.com/w3c/css-houdini-drafts/blob/master/composited-scrolling-and-animation/UseCases.md]) use cases include effects that respond to and are synchronized with scroll position.  Below are additional use cases which require more control over exactly how scrolling behaves.
+The [Composited Scrolling](https://github.com/w3c/css-houdini-drafts/blob/master/composited-scrolling-and-animation/UseCases.md) use cases include effects that respond to and are synchronized with scroll position.  Below are additional use cases which require more control over exactly how scrolling behaves.
 
 Hidey bars
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