Remove _ at the end of filename

Author: oraculix

doc/guides/Local-Install-HOWTO.adoc

@@ -74,7 +74,7 @@ useradd ansible
 su - ansible
 mkdir .ssh
 cd .ssh/
-vi authorized_keys_
+vi authorized_keys
 ssh-keygen -t ed25519
 ## No password
 ## Paste the contents of id_ecdsa.pub into /root/.ssh/authorized_keys on target machine