Merge pull request #1444 from piperchester/patch-1

Update README.md

README.md

@@ -72,7 +72,7 @@ Support us with a monthly donation and help us continue our activities. [[Become
 
 ## Sponsors
 
-Become a sponsor and get your logo on our README on Github with a link to your site. [[Become a sponsor](https://opencollective.com/sinon#sponsor)]
+Become a sponsor and get your logo on our README on GitHub with a link to your site. [[Become a sponsor](https://opencollective.com/sinon#sponsor)]
 
 <a href="https://opencollective.com/sinon/sponsor/0/website" target="_blank"><img src="https://opencollective.com/sinon/sponsor/0/avatar.svg"></a>
 <a href="https://opencollective.com/sinon/sponsor/1/website" target="_blank"><img src="https://opencollective.com/sinon/sponsor/1/avatar.svg"></a>