change wording in help text
change wording in help text

authentication key -> management key

Yubico/yubico-piv-tool,akgood/yubico-piv-tool,Yubico/yubico-piv-tool,Yubico/yubico-piv-tool,akgood/yubico-piv-tool,akgood/yubico-piv-tool,akgood/yubico-piv-tool