Minor link fix (#98)

.gitignore

@@ -1,3 +1,4 @@
 .idea
 .DS_Store
 *.swp
+*.vscode/

README.md

@@ -15,7 +15,7 @@ Scripts used to send [ROS](https://www.ros.org/) messages to an [TCP endpoint](h
 
 This Unity package provides three main features:
 
-- ROSConnection: See the [Unity Robotics Hub](https://github.com/Unity-Technologies/Unity-Robotics-Hub/blob/master/tutorials/ros_unity_integration/README.md) repository for information and tutorials on how to use this component.
+- ROSConnection: See the [Unity Robotics Hub](https://github.com/Unity-Technologies/Unity-Robotics-Hub/blob/main/tutorials/ros_unity_integration/README.md) repository for information and tutorials on how to use this component.
 
 - [Message Generation](MessageGeneration.md)