docs: update readme

Author: usefulthink

README.md

@@ -130,8 +130,8 @@ library object when the library is loaded. In case of an error while loading
 the library (might be due to poor network conditions and other unforseeable
 circumstances), the promise is rejected with an error.
 
-Calling this function for the first time will trigger loading the maps API
-itself.
+Calling this function for the first time will trigger loading the Google 
+Maps JavaScript API itself.
 
 The following libraries are available: