Replace question.md issue template with link to the discussions page

Author: GreenImp

.github/ISSUE_TEMPLATE/config.yml

@@ -1 +1,5 @@
 blank_issues_enabled: false
+contact_links:
+  - name: Question & Discussion
+    url: https://github.com/dice-roller/rpg-dice-roller/discussions
+    about: Please ask and answer questions here.