Document URL: https://access.redhat.com/documentation/en-us/red_hat_satellite/6.11/html/administering_red_hat_satellite/renewing-the-custom-ssl-certificate_admin#Renewing_a_Custom_SSL_Certificate_on_capsule_admin

Section Number and Name: 13.2. Renewing a Custom SSL certificate on Capsule Server

Describe the issue: 
On part 5, deploying the certificate, it's suggested to run following command:

```
# satellite-installer --scenario capsule \
--foreman-proxy-content-parent-fqdn "satellite.example.com" \
--foreman-proxy-register-in-foreman "true" \
--foreman-proxy-foreman-base-url \ "https://satellite.example.com"
--foreman-proxy-content-certs-tar "/root/My_Certificates/capsule.example.com-certs.tar" \
--certs-update-server
```

This output differs from the output the capsule-certs-generate command from section '2.' is providing.
Most problematic one, the argument '--foreman-proxy-content-parent-fqdn' does not exist in satellite-installer

Suggestions for improvement: 
Remove the non-existing argument from command section

Additional information: 
Double-checked on Satellite-6.11 through 6.13.