Update issue templates (#4960)

* Update issue templates

* Delete ISSUE_TEMPLATE.md

* Disable blank issues with newfangled issue template method

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1 @@
+blank_issues_enabled: false

.github/ISSUE_TEMPLATE/ISSUE_TEMPLATE.md → .github/ISSUE_TEMPLATE/issue-template.md

@@ -1,3 +1,12 @@
+---
+name: Issue Template
+about: Report a bug, feature request or another sort of issue
+title: ''
+labels: ''
+assignees: ''
+
+---
+
 Client version: x.x.x
 Server OS: Windows/Linux/macOS/BSD/...
 Cuberite Commit id: (Found at the top of the server's console output)