update issue config

Author: methane

.github/ISSUE_TEMPLATE/config.yml

@@ -1,4 +1,8 @@
 contact_links:
   - name: Failed to build
+    about: Ask help for build error.
     url: "https://github.com/PyMySQL/mysqlclient/discussions/new?category=build"
-    about: Ask help in this forum.
+
+  - name: Ask question
+    about: Ask other questions.
+    url: "https://github.com/PyMySQL/mysqlclient/discussions/new?category=q-a"