Add note when you forgot the BOOT button

docs/docs/getting-started.mdx

@@ -24,6 +24,7 @@ _Make sure this page is opened in a Chromium-based browser on a desktop. The sof
 
 1. Press the blue **connect** button below, a pop-up window will appear with a list of available USB devices.
 2. Hold down the `BOOT` button on the Onju Voice PCB and connect a USB cable to your computer.
+    - If you don't do this, the device will reconnect all the time.
 3. In the pop-up window, there should now appear a new entry. Select this USB serial port and click **Connect**.
 4. Select **Install Onju Voice Satellite**, then **Install**.
 5. Once the installation is complete, select **Next**.