docs: fix broken link in banner

close #1

Author: jlengstorf

README.md

@@ -1,4 +1,4 @@
-<a href="https://ibm.biz/gramps-graphql/"><img src="https://gramps-graphql.github.io/gramps-express/assets/img/gramps-banner.png" alt="GrAMPS · An easier way to manage the data sources powering your GraphQL server" width="450"></a>
+<a href="https://ibm.biz/gramps-graphql"><img src="https://gramps-graphql.github.io/gramps-express/assets/img/gramps-banner.png" alt="GrAMPS · An easier way to manage the data sources powering your GraphQL server" width="450"></a>
 
 # GrAMPS GraphQL Data Source for the [IMDB API](http://www.theimdbapi.org/)
 [![license](https://img.shields.io/npm/l/@gramps/data-source-imdbapi.svg)](https://github.com/gramps-graphql/data-source-imdbapi/blob/master/LICENSE) [![npm version](https://img.shields.io/npm/v/@gramps/data-source-imdbapi.svg?style=flat)](https://www.npmjs.com/package/@gramps/data-source-imdbapi) [![Build Status](https://travis-ci.org/gramps-graphql/data-source-imdbapi.svg?branch=master)](https://travis-ci.org/gramps-graphql/data-source-imdbapi) [![Maintainability](https://api.codeclimate.com/v1/badges/ac264833fac1fbd1afe0/maintainability)](https://codeclimate.com/github/gramps-graphql/data-source-imdbapi/maintainability) [![Test Coverage](https://api.codeclimate.com/v1/badges/ac264833fac1fbd1afe0/test_coverage)](https://codeclimate.com/github/gramps-graphql/data-source-imdbapi/test_coverage) [![Greenkeeper badge](https://badges.greenkeeper.io/gramps-graphql/data-source-imdbapi.svg)](https://greenkeeper.io/)