Minor - Systemd enable command to enable CRI-O at boot time

Added "sudo systemctl enable crio enable" to configure systemd to enable CRI-O at boot time, as shown in the CRI-O install.md doc: https://github.com/cri-o/cri-o/blob/master/install.md#user-content-starting-cri-o

Author: eTimS

content/en/docs/setup/production-environment/container-runtimes.md

@@ -420,6 +420,7 @@ Start CRI-O:
 
 ```shell
 sudo systemctl daemon-reload
+sudo systemctl enable crio
 sudo systemctl start crio
 ```