One more CC license fix

Author: krivard

docs/api/README.md

@@ -43,7 +43,7 @@ licensing, where applicable.
 
 Any data which is produced novelly by Delphi and is intentionally and openly
 surfaced by Delphi through this API is hereby licensed
-[CC-BY](https://creativecommons.org/licenses/by/4.0/) except where otherwise
+[CC BY](https://creativecommons.org/licenses/by/4.0/) except where otherwise
 noted. Endpoints, as specified by the `source` parameter, which are known to
 wholly or partially serve data under this license include: