test_radio_signal_rx app: Fixed a typo.
test_radio_signal_rx app: Fixed a typo.

raduiliescu/wixel-DexDrip,sm6xmm/wixel-xDrip,attackcrow/wixel,Cagier/wixel-xDrip,attackcrow/wixel,StephenBlackWasAlreadyTaken/wixel-xDrip,saercnap/wixel-DexDrip,markncooper/burnerlight,pdg137/wixel-sdk,Cagier/wixel-xDrip,jamorham/wixel-xDrip,raduiliescu/wixel-DexDrip,novagannas/wixel-xDrip,jamorham/wixel-xDrip,StephenBlackWasAlreadyTaken/wixel-xDrip,novagannas/wixel-xDrip,novagannas/wixel-xDrip,jamorham/wixel-xDrip,jamorham/wixel-xDrip,saercnap/wixel-DexDrip,kevinwchang/wixel-sdk,kevinwchang/wixel-sdk,Cagier/wixel-xDrip,StephenBlackWasAlreadyTaken/wixel-xDrip,pdg137/wixel-sdk,sm6xmm/wixel-xDrip,pdg137/wixel-sdk,sm6xmm/wixel-xDrip,sm6xmm/wixel-xDrip,kevinwchang/wixel-sdk,saercnap/wixel-DexDrip,markncooper/burnerlight,raduiliescu/wixel-DexDrip,attackcrow/wixel,markncooper/burnerlight,attackcrow/wixel