[contributing] Move learning outcomes up

Author: woojiahao

.github/ISSUE_TEMPLATE/exercise_discussion.yaml

@@ -25,6 +25,13 @@ body:
       description: Which lesson does this exercise belong to? Links are fine
     validations:
       required: true
+  - type: textarea
+    attributes:
+      label: Exercise learning outcomes
+      description: What is the exercise's learning outcomes?
+      placeholder: Git concepts tested, lessons covered, etc.
+    validations:
+      required: true
   - type: textarea
     attributes:
       label: Instructions for students
@@ -35,13 +42,6 @@ body:
         3. ...
     validations:
       required: true
-  - type: textarea
-    attributes:
-      label: Exercise learning outcomes
-      description: What is the exercise's learning outcomes?
-      placeholder: Git concepts tested, lessons covered, etc.
-    validations:
-      required: true
   - type: textarea
     attributes:
       label: Exercise setup