Fix correct path of function when click on mobile links (#351)

* change master to main branch

* Update README.md

README.md

@@ -5,7 +5,7 @@ fetching layer to provide a simplified and consistent API over various remote
 data sources such as databases or web services via batching and caching.
 
 [![Build Status](https://travis-ci.org/graphql/dataloader.svg)](https://travis-ci.org/graphql/dataloader)
-[![Coverage Status](https://coveralls.io/repos/graphql/dataloader/badge.svg?branch=master&service=github)](https://coveralls.io/github/graphql/dataloader?branch=master)
+[![Coverage Status](https://coveralls.io/repos/graphql/dataloader/badge.svg?branch=master&service=github)](https://coveralls.io/github/graphql/dataloader?branch=main)
 
 A port of the "Loader" API originally developed by [@schrockn][] at Facebook in
 2010 as a simplifying force to coalesce the sundry key-value store back-end
@@ -655,7 +655,7 @@ DataLoader and how it works.
 [express]: http://expressjs.com/
 [babel/polyfill]: https://babeljs.io/docs/usage/polyfill/
 [lru_map]: https://github.com/rsms/js-lru
-[source code]: https://github.com/graphql/dataloader/blob/master/src/index.js
+[source code]: https://github.com/graphql/dataloader/blob/main/src/index.js
 
 # Contributing to this repo