docs: Add Parkside mowers to device list

DEVICES.md

@@ -822,6 +822,7 @@ of device.
 ### Lawnmowers
 
 - MoeBot S-series mowers (may require protocol version set manually to 3.4)
+- Parkside PMRDA 20-Li A1 / PAMRS 1000 A1 mowers
 
 ### Locks