Update Bitflyer doc (#3515)
Update Bitflyer doc (#3515)

* Update bitflyer doc

* Update cryptocurrencies.yml

* update bitflyer url

vgarmash/twofactorauth,bjorno/twofactorauth,Jawshy/twofactorauth,rugk/twofactorauth,bjorno/twofactorauth,Jawshy/twofactorauth,rugk/twofactorauth,rj175/twofactorauth,Nitrokey/dongleauth,Jawshy/twofactorauth,Nitrokey/dongleauth,bjorno/twofactorauth,rugk/twofactorauth,jdavis/twofactorauth,jdavis/twofactorauth,vgarmash/twofactorauth,jdavis/twofactorauth,rj175/twofactorauth,Nitrokey/dongleauth,vgarmash/twofactorauth,Jawshy/twofactorauth,rj175/twofactorauth