Use Github Discussions for Q&A

.github/ISSUE_TEMPLATE/config.yml

@@ -1,5 +1,8 @@
 blank_issues_enabled: false
 contact_links:
+  - name: Question
+    url: https://github.com/pmd/pmd/discussions?discussions_q=category%3AQ%26A
+    about: Feel free to ask any question about PMD and its usage
   - name: PMD Designer Issues
     url: https://github.com/pmd/pmd-designer/issues
     about: Issues about the rule designer

.github/ISSUE_TEMPLATE/question.md

@@ -1,14 +0,0 @@
----
-name: Question
-about: Feel free to ask any question about PMD and its usage
-title: ''
-labels: 'a:question'
-assignees: ''
-
----
-
-<!-- Have a look at https://github.com/pmd/pmd/issues?utf8=%E2%9C%93&q=label%3Aa%3Aquestion if there is already
-a similar question -->
-
-**Description:**
-