Fix right button issue on some hardware

My MM-control-board v0.3 has following ADC readings in DEBUG_BUTTONS
- none = 1023
- left = 169
- mid = 91-92
- right = 0

As the comparison was larger than 0 MY MMU2 right button wasn't detected.

src/modules/buttons.cpp

@@ -15,7 +15,7 @@ int8_t Buttons::DecodeADC(uint16_t rawADC) {
     // Doesn't handle multiple pressed buttons at once
 
     for (int8_t buttonIndex = 0; buttonIndex < config::buttonCount; ++buttonIndex) {
-        if (rawADC > config::buttonADCLimits[buttonIndex][0] && rawADC <= config::buttonADCLimits[buttonIndex][1])
+        if (rawADC >= config::buttonADCLimits[buttonIndex][0] && rawADC <= config::buttonADCLimits[buttonIndex][1])
             return buttonIndex;
     }