Tiny typo

Added a possible missing 'a'.

Feel free to ignore :)

Author: mdouglasbrett

README.md

@@ -136,7 +136,7 @@ A collective list of JSON APIs for use in web development.
 | Full Contact | Get Social Media profiles and contact Information | Yes | [Go!](https://www.fullcontact.com/developer/docs/) |
 | LinkedIn REST-API | The foundation of all digital integrations with LinkedIn | Yes | [Go!](https://developer.linkedin.com/docs/rest-api) |
 | Facebook API | Facebook Login, Share on FB, Social Plugins, Analytics and more | Yes | [Go!](https://developers.facebook.com/) |
-| Twitter API | Read and write Twitter dat | Yes | [Go!](https://dev.twitter.com/rest/public) |
+| Twitter API | Read and write Twitter data | Yes | [Go!](https://dev.twitter.com/rest/public) |
 
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