Showcase the new-style lookup plugin access in the authorized_key docs rather than the old-style $FILE

authorized_key

@@ -65,10 +65,10 @@ author: Brad Olson
 
 EXAMPLES = '''
 # Example using key data from a local file on the management machine
-authorized_key: user=charlie key='$FILE(/home/charlie/.ssh/id_rsa.pub)
+authorized_key: user=charlie key="{{ lookup('file', '/home/charlie/.ssh/id_rsa.pub') }}"
 
 # Using alternate directory locations:
-authorized_key: user=charlie key='$FILE(/home/charlie/.ssh/id_rsa.pub)' sshdir='/etc/ssh/authorized_keys/charlie' manage_dir=no
+authorized_key: user=charlie key="{{ lookup('file', '/home/charlie/.ssh/id_rsa.pub') }}"  sshdir='/etc/ssh/authorized_keys/charlie' manage_dir=no
 '''
 
 # Makes sure the public key line is present or absent in the user's .ssh/authorized_keys.