docs: migrate issue templates to github

Author: mattlewis92

.github/ISSUE_TEMPLATE.md

@@ -1,3 +1,3 @@
 The issue tracker is for bug reports and feature requests only!
 
-To file support issues, please consider becoming a Silver level sponsor on Patreon: https://www.patreon.com/mattlewis92
+To file support issues, please consider becoming a Silver level sponsor on GitHub: https://github.com/users/mattlewis92/sponsorship

.github/ISSUE_TEMPLATE/Support_question.md

@@ -1,9 +1,9 @@
 ---
 name: "\U0001F914Support question"
 about: Ask a question about the project
-title: Become a sponsor on Patreon to ask questions
+title: Become a sponsor on Github to ask questions
 labels: ''
 assignees: ''
 ---
 
-To ask any questions you'd like about the calendar beyond bug and feature requests, you must become a silver sponsor or higher on Patreon: https://www.patreon.com/mattlewis92
+To ask any questions you'd like about the calendar beyond bug and feature requests, you must become a silver sponsor or higher on GitHub: https://github.com/users/mattlewis92/sponsorship