Update mapping for reset button in new PCB

The reset button has moved from R11 to T5 in the PCB design. I've left
the old pin in the commit for future reference

data/pins_sonata.xdc

@@ -11,7 +11,10 @@ create_clock -period 40.000 -name mainClk -waveform {0.000 20.000} [get_ports ma
 set_property -dict { PACKAGE_PIN P15 IOSTANDARD LVCMOS33 } [get_ports mainClk];
 
 ## Reset
-set_property -dict { PACKAGE_PIN R11 IOSTANDARD LVCMOS33 } [get_ports {nrst}];
+## PCB revision 0.3 and above
+set_property -dict { PACKAGE_PIN T5 IOSTANDARD LVCMOS33 } [get_ports {nrst}];
+## PCB revision 0.2 and below
+#set_property -dict { PACKAGE_PIN R11 IOSTANDARD LVCMOS33 } [get_ports {nrst}];
 
 ## General purpose LEDs
 set_property -dict { PACKAGE_PIN B13 IOSTANDARD LVCMOS33 } [get_ports {usrLed[0]}];