Update images and instructions to Sumac release for 'Manage Course Sections' doc

Author: jswope00

source/_images/educator_how_tos/section-delete.png

@@ -161,14 +161,13 @@ section.
 
 To delete a section, follow these steps.
 
-#. Select the **Delete** icon in the section that you want to delete.
+#. Select the **Delete** option from the kebab menu of the section that you want to delete.
 
   .. image:: /_images/educator_how_tos/section-delete.png
-   :alt: The section with Delete icon circled.
+   :alt: The section with Delete button highlighted.
    :width: 500
 
-2. When you receive the confirmation prompt, select **Yes, delete this
-   section**.
+2. When you receive the confirmation prompt, select **Delete** to confirm the deletion.
 
 
 .. seealso::