Update README.md

typo

Author: nytamin

README.md

@@ -8,7 +8,7 @@ The _Core_ is a _Meteor/Node.JS_-based web server that serves the web GUIs as we
 
 ## General Sofie System Information
 
-- [_Sofie_ Documentation](https://sofie-automation.github.io/sofie-core//)
+- [_Sofie_ Documentation](https://sofie-automation.github.io/sofie-core/)
 - [_Sofie_ Releases](https://sofie-automation.github.io/sofie-core//releases)
 - [Contribution Guidelines](CONTRIBUTING.md)
 - [License](LICENSE)