Merge pull request #3362 from michal-p/patch-2

Update part2a.md add step10 in header of exercise

Author: mluukkai

src/content/2/en/part2a.md

@@ -740,7 +740,7 @@ The application can, for example, look like this:
 
 ![arbitrary number of courses feature add-on](../../images/teht/10e.png)
 
-<h4>2.5: separate module</h4>
+<h4>2.5: Separate module step10</h4>
 
 Declare the <i>Course</i> component as a separate module, which is imported by the <i>App</i> component. You can include all subcomponents of the course in the same module.