Add pillar examples for ssh_known_hosts config.

pillar.example

     # Manage the ~/.ssh/config file
     ssh_known_hosts:
       importanthost:
+        port: 22
         fingerprint: 16:27:ac:a5:76:28:2d:36:63:1b:56:4d:eb:df:a6:48
+        key: PUBLICKEY
+        enc: ssh-rsa
+        hash_known_hosts: True
+        timeout: 5
+        fingerprint_hash_type: sha256
     ssh_known_hosts.absent:
       - notimportanthost
     ssh_config: