make a consistent step 3

Author: hectorsector

config.yml

@@ -94,7 +94,7 @@ steps:
 
 # 3
 - title: Approve the course metadata
-  description: Approve the course metadata
+  description: Approve the pull request containing the course's metadata.
   event: pull_request_review.submitted
   actions:
   - type: gate

responses/approve-first-pr.md

@@ -1 +1,10 @@
-approve this pr
+## Step 3: Submit your approval 
+
+Fantastic! Your course now has the required metadata to be listed on the courses page. 
+
+### :keyboard: Activity: Approve the metadata pull request
+
+1. Approve this pull request.
+
+<hr>
+<h3 align="center">I'll respond below when I detect an pull request review approval on this pull request.</h3>