Updated master branch name

Author: jeffreylanters

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,6 +1,6 @@
 **Before submitting a pull request,** please make sure the following is done:
 
-- Fork [the repository](https://github.com/jeffreylanters/react-unity-webgl) and create your branch from `master`.
+- Fork [the repository](https://github.com/jeffreylanters/react-unity-webgl) and create your branch from `main`.
 - Run `npm install` in the repository root.
 - Ensure the [test environment](https://github.com/jeffreylanters/react-unity-webgl-tests) passes using `npm start` on the library.
 - Format your code with [prettier](https://github.com/prettier/prettier).

README.md

@@ -1,8 +1,8 @@
 <div align="center">
 
-![readme splash](https://raw.githubusercontent.com/jeffreylanters/react-unity-webgl/master/.github/WIKI/repository-readme-splash.png)
+![readme splash](https://raw.githubusercontent.com/jeffreylanters/react-unity-webgl/main/.github/WIKI/repository-readme-splash.png)
 
-[![license](https://img.shields.io/badge/license-Apache_2.0-red.svg?style=for-the-badge)](https://github.com/jeffreylanters/react-unity-webgl/blob/master/LICENSE.md)
+[![license](https://img.shields.io/badge/license-Apache_2.0-red.svg?style=for-the-badge)](https://github.com/jeffreylanters/react-unity-webgl/blob/main/LICENSE.md)
 [![npm](https://img.shields.io/npm/v/react-unity-webgl.svg?style=for-the-badge)](https://www.npmjs.com/package/react-unity-webgl)
 [![build](https://img.shields.io/github/workflow/status/jeffreylanters/react-unity-webgl/Pre-Compile%20and%20Lint?style=for-the-badge)](https://github.com/jeffreylanters/react-unity-webgl/actions)
 [![deployment](https://img.shields.io/github/deployments/jeffreylanters/react-unity-webgl/Node%20Package%20Registry?style=for-the-badge)](https://github.com/jeffreylanters/react-unity-webgl/deployments/activity_log?environment=Node+Package+Registry)