Add migration guide

site/content/docs/5.2/migration.md

@@ -17,6 +17,15 @@ Boosted v5.2.3 has landed with a handful of urgent bug fixes from Bootstrap and
 
 If you need more details about the changes, please refer to the [v5.2.3 release](https://github.com/Orange-OpenSource/Orange-Boosted-Bootstrap/releases/tag/v5.2.3).
 
+### Components
+
+- **Stepped Process**
+  - Current step has been slightly changed for accessibility purpose; the link to this step has been converted to plain text. Please reflect this modification into your websites.
+  ```diff
+  -        <a class="stepped-process-link" href="#" title="2. Review" aria-current="step">Review</a>
+  +        <a class="stepped-process-link" title="2. Review" aria-current="step">Review</a>
+  ```
+
 ## v5.2.2
 
 <hr class="mb-4">