Update 'OpenPGP to Card'

OpenPGP-to-Card.md

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+GPG private keys can be copied or moved to the Yubikey. The following examples moves them.
+
+
+```shell
+❯ gpg --edit-key <keyId>
+
+gpg> toggle
+gpg> key 1
+gpg> keytocard
+
+Please select where to store the key:
+   (1) Signature key
+   (3) Authentication key
+Your selection? 1
+
+gpg> key 1
+gpg> key 2
+gpg> keytocard
+
+Please select where to store the key:
+   (2) Encryption key
+Your selection? 2
+
+gpg> key 2
+gpg> key 3
+gpg> keytocard
+
+Please select where to store the key:
+   (3) Authentication key
+Your selection? 3
+
+gpg> quit
+```
+
+
+> https://ruimarinho.gitbooks.io/yubikey-handbook/content/openpgp/importing-keys.html