Revise Roborock vacuum area cleaning instructions

Updated instructions for cleaning segments with Roborock vacuum, including a reference to mapping areas in Home Assistant as introduced in the release 2026.3

I was quite confused with the current documentation as to how to use the Home Assisant vanilla cleaning area action. It is also kind of hard to clarify between the Roborock device and the vacuum entity named "Roborock" belonging to it, without its documentation being mentioned or linked in the current help page.

More information on confusion on this in the Roborock python library I used to try and find help on this Python-roborock/python-roborock#557 (comment)

Author: remidebette

source/_integrations/roborock.markdown

@@ -425,7 +425,9 @@ We plan to make the process simpler in the future, but for now, it is a multi-st
               "17": Living room
       ```
 
-3. Go back to {% my developer_call_service service="vacuum.send_command" title="**Settings** > **Developer tools** > **Actions** > **Vacuum: Send Command**" %} then type `app_segment_clean` as your command and `segments` with a list of the 2-digit IDs you want to clean. Then, add `repeat` with a number (ranging from 1 to 3) to determine how many times you want to clean these areas.
+3. You can then apply [Mapping your areas to Home Assistant areas](https://www.home-assistant.io/integrations/vacuum/#mapping-your-vacuum-areas-to-home-assistant-areas) to the Roborock vacuum entity linked to your Roborock device.
+
+Alternatively, go back to {% my developer_call_service service="vacuum.send_command" title="**Settings** > **Developer tools** > **Actions** > **Vacuum: Send Command**" %} then type `app_segment_clean` as your command and `segments` with a list of the 2-digit IDs you want to clean. Then, add `repeat` with a number (ranging from 1 to 3) to determine how many times you want to clean these areas.
 
 Example: