Correct typo in imports

Author: mdamien

src/spectacle.jsx

@@ -9,7 +9,7 @@ import Fit from './fit';
 import Heading from './heading';
 import Image from './image';
 import Layout from './layout';
-import Link from './Link';
+import Link from './link';
 import ListItem from './list-item';
 import List from './list';
 import Quote from './quote';
@@ -36,4 +36,4 @@ export {
   S,
   Slide,
   Text
-}
+}