Update config.yml

.github/ISSUE_TEMPLATE/config.yml

@@ -3,3 +3,6 @@ contact_links:
   - name: 讨论 / Discussions
     url: https://github.com/gedoor/legado/discussions
     about: Please ask and answer questions here.
+  - name: 常见问题 / Wiki
+    url: https://github.com/gedoor/legado/wiki
+    about: Read wiki if your are new here.