Update README.md

google#166

README.md

@@ -33,6 +33,6 @@ If you wish to use the icon set with Polymer, we recommend consuming them via th
 
 ## License
 
-We have made these icons available for you to incorporate them into your products under the [Creative Common Attribution 4.0 International License (CC-BY 4.0)](http://creativecommons.org/licenses/by/4.0/). Feel free to remix and re-share these icons and documentation in your products.
+We have made these icons available for you to incorporate them into your products under the [Creative Commons Attribution 4.0 International License (CC-BY 4.0)](http://creativecommons.org/licenses/by/4.0/). Feel free to remix and re-share these icons and documentation in your products.
 We'd love attribution in your app's *about* screen, but it's not required.
 The only thing we ask is that you not re-sell the icons themselves.