Added confirm for checking discussion threads

Signed-off-by: Jakob <minenash@protonmail.com>

.github/ISSUE_TEMPLATE/4-feature-request.yml

@@ -9,6 +9,8 @@ body:
       options:
         - label: I checked the [existing issues](https://github.com/modrinth/code/issues) for duplicate feature requests
           required: true
+        - label: I checked the [existing discussions](https://github.com/orgs/modrinth/discussions) for duplicate feature requests
+          required: true
         - label: I have checked that this feature request is not on our [roadmap](https://roadmap.modrinth.com)
           required: true
   - type: dropdown
@@ -43,4 +45,4 @@ body:
       label: Additional context
       description: Add any other context or screenshots about the suggested enhancement here.
     validations:
-      required: false
+      required: false