TS0601 thermostat 2 - How to pair (Koenkk#1827)

A paragraph about pairing was missing. I added the Information under Notes.

I found the information in the (paper) user-manual

Author: Clemensao

docs/devices/TS0601_thermostat_2.md

@@ -24,12 +24,14 @@ pageClass: device-page
 
 
 <!-- Notes BEGIN: You can edit here. Add "## Notes" headline if not already present. -->
+## Notes
 
+### Pairing
+Long press left button (Auto/Manual Mode) AND right button (Comfort/Energy Saving Mode) until "Zigbee connection status"-light (the wifi icon) flashes
 
 <!-- Notes END: Do not edit below this line -->
 
 
-
 ## Exposes
 
 ### Battery_low (binary)