Add requirement to pass a Codility test

Rather than having this be an entry criterion to the Piscine, we want to
make it an exit criterion of ITP. This better reflects completing ITP
meaning you can apply the skills learnt in ITP.

Author: illicitonion

org-cyf-itp/content/data-flows/success/index.md

@@ -5,8 +5,10 @@ layout = "success"
 emoji= "✅"
 menu_level = [ "module" ]
 weight = 11
-[[objectives]]
-1="Submit step 4 on the CYF Course Portal"
+objectives = [[
+    "Submit step 4 on the CYF Course Portal",
+    "Submit step 5 of the CYF Course Portal",
+]]
 +++
 
 ### 🎯 You've achieved your learning objectives if you can:
@@ -40,6 +42,12 @@ weight = 11
     - A link to your issue for "[LinkedIn Social Selling Index](https://github.com/CodeYourFuture/Module-Data-Flows/issues/12)". Your issue must show your current index and actions you will take to improve it.
 1. Submit the issue link to step 4 of ITP on [CYF Course Portal](https://application-process.codeyourfuture.io/).
 
+## ✅ To complete this _course_, you must:
+
+1. Pass your Codility test.
+   - See [Pass Your Codility Test](https://github.com/CodeYourFuture/Module-Data-Flows/issues/321) for details.
+1. Submit the link to your Codility test as step 5 of ITP on [CYF Course Portal](https://application-process.codeyourfuture.io/).
+
 > [!NOTE]
 > A pull request is _completed_ when a volunteer has added the "Complete" tag. If nobody has reviewed your PR after one week, please ask on Slack in #cyf-code-review.