Changing default branch to main.

README.md

@@ -1,10 +1,10 @@
 moodle-quiz_archive 
 =========================
 [![Latest Release](https://img.shields.io/github/v/release/bfh/moodle-quiz_archive?sort=semver&color=orange)](https://github.com/bfh/moodle-quiz_archive/releases)
-[![Build Status](https://github.com/bfh/moodle-quiz_archive/workflows/Moodle%20Plugin%20CI/badge.svg?branch=master)](https://github.com/bfh/moodle-quiz_archive/actions?query=workflow%3A%22Moodle+Plugin+CI%22+branch%3Amaster)
+[![Build Status](https://github.com/bfh/moodle-quiz_archive/workflows/Moodle%20Plugin%20CI/badge.svg?branch=main)](https://github.com/bfh/moodle-quiz_archive/actions?query=workflow%3A%22Moodle+Plugin+CI%22+branch%3Amain)
 [![PHP Support](https://img.shields.io/badge/php-7.2--8.2-blue)](https://github.com/bfh/moodle-quiz_archive/actions)
 [![Moodle Support](https://img.shields.io/badge/Moodle-3.9--4.3+-orange)](https://github.com/bfh/moodle-quiz_archive/actions)
-[![License GPL-3.0](https://img.shields.io/github/license/bfh/moodle-quiz_archive?color=lightgrey)](https://github.com/bfh/moodle-quiz_archive/blob/master/LICENSE)
+[![License GPL-3.0](https://img.shields.io/github/license/bfh/moodle-quiz_archive?color=lightgrey)](https://github.com/bfh/moodle-quiz_archive/blob/main/LICENSE)
 [![GitHub contributors](https://img.shields.io/github/contributors/bfh/moodle-quiz_archive)](https://github.com/bfh/moodle-quiz_archive/graphs/contributors)
 
 Moodle quiz report plugin to achieve archiving your test, by printing out all attempts at once.