chore: update discussion template

.github/DISCUSSION_TEMPLATE/general.yml

@@ -9,15 +9,6 @@ body:
             [contributing guidelines](https://github.com/cotes2020/jekyll-theme-chirpy/blob/master/docs/CONTRIBUTING.md).
           required: true
 
-  - type: dropdown
-    attributes:
-      label: What is the topic?
-      options:
-        - Sharing tips and tricks
-        - Just chatting
-    validations:
-      required: true
-
   - type: textarea
     attributes:
       label: Description

.github/DISCUSSION_TEMPLATE/ideas.yml

@@ -0,0 +1,7 @@
+body:
+  - type: textarea
+    attributes:
+      label: Description
+      description: Please describe in detail what you want to share.
+    validations:
+      required: true