[2.0.x] reset bltouch on home (#11018)

Added reset bltouch instead. This ensure properly stow even when in error.

Marlin/src/gcode/calibrate/G28.cpp

   #endif
 
   #if ENABLED(BLTOUCH)
+    bltouch_command(BLTOUCH_RESET);
     set_bltouch_deployed(false);
   #endif