Changed Night Mode led PV

Hi @tehungtseng, I had to change the pv in a led, as the previous associated device doesn't work, thanks.

NON-APPROVED/TS2/ts2-cryomodule/TS2_main2.bob

@@ -3405,7 +3405,7 @@
   </widget>
   <widget type="label" version="2.0.0">
     <name>Label_20</name>
-    <text>version 2020-07-14 12:00</text>
+    <text>version 2020-07-21 17:00</text>
     <x>2287</x>
     <y>1303</y>
     <width>197</width>