Update content/hardware/09.kits/maker/nesso-n1/datasheet/datasheet.md

Co-authored-by: Ernesto Voltaggio <92443068+91volt@users.noreply.github.com>

Author: TaddyHC

content/hardware/09.kits/maker/nesso-n1/datasheet/datasheet.md

@@ -178,6 +178,7 @@ Use the limits below to define the operating environment, thermal margins, and p
 **Power Button Behavior:**
 - **Single press:** Turns on the device if powered down or resets if done while operating
 - **Double press:** Turns off the device
+- **Long press:** Enters Download/Bootloader mode while operating
 
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