make a consistent step 15

Author: hectorsector

config.yml

@@ -506,7 +506,7 @@ steps:
 
 # 15
 - title: Approve the steps
-  description: Approve the steps
+  description: Submit an approval for the steps pull request.
   event: pull_request_review.submitted
   actions:
   - type: gate

responses/13.0_publish.md

@@ -1 +1,10 @@
-Approve this PR. 
+## Step 15: Submit your approval 
+
+The course repository is now ready to be finalized.
+
+### :keyboard: Activity: Approve the course steps
+
+1. Approve this pull request.
+
+<hr>
+<h3 align="center">I'll respond below when I detect an approval on this pull request.</h3>