KeyPairType docs fix
KeyPairType docs fix

VirgilSecurity/VirgilCryptoiOS,VirgilSecurity/virgil-foundation-x,VirgilSecurity/virgil-foundation-x,VirgilSecurity/virgil-foundation-x,VirgilSecurity/VirgilCryptoiOS,VirgilSecurity/virgil-crypto-ios,VirgilSecurity/virgil-crypto-ios,VirgilSecurity/virgil-foundation-x,VirgilSecurity/VirgilCryptoiOS,VirgilSecurity/virgil-crypto-ios,VirgilSecurity/virgil-foundation-x