update issue template

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -2,7 +2,6 @@ name: Bug report
 about: Create a report to help us improve
 title: "[BUG]"
 labels: ["bug"]
-assignees: ''
 body:
   - type: checkboxes
     id: self_check

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,5 @@
+blank_issues_enabled: false
+contact_links:
+  - name: Q&A / 常见问题解答
+    url: https://cfbed.sanyue.de/qa/
+    about: Please find answers to common questions here / 请在这里找到常见问题的答案

.github/ISSUE_TEMPLATE/help-wanted-issue-template.yml

@@ -2,7 +2,6 @@ name: Help wanted issue template
 about: Help wanted template.
 title: '[Help Wanted]'
 labels: ['help wanted']
-assignees: ''
 body:
   - type: checkboxes
     id: self_check