Update feature_reqeust.yaml

Author: intitni

.github/ISSUE_TEMPLATE/feature_reqeust.yaml

@@ -8,7 +8,7 @@ body:
   - type: markdown
     attributes:
       value: |
-        Thanks for taking the time to fill out this feature request! 
+        Thanks for taking the time to fill out this feature request! But please firstly [post your idea in discussion](https://github.com/intitni/CopilotForXcode/discussions/new?category=ideas) so that we can discuss about it in advance.
   - type: checkboxes
     id: before-reporting
     attributes:
@@ -25,4 +25,4 @@ body:
       placeholder: Tell us what you want!
       value: "I want a feature!"
     validations:
-      required: true
+      required: true