Description of problem:

There are some invalid links in the Satellite documentation

How reproducible:

Access the page [Chapter 6. Performing additional configuration on Satellite Server](https://docs.redhat.com/en/documentation/red_hat_satellite/6.18/html-single/installing_satellite_server_in_a_connected_network_environment/index#performing-additional-configuration-on-server_satellite) in 'Additional resources' and check the links below:

[Registering your system with Red Hat Insights](https://docs.redhat.com/en/documentation/red_hat_insights/1-latest/html/client_configuration_guide_for_red_hat_insights/assembly-client-configuring-insights-client#proc-registering-system-insights_insights-cg-configuring-client)

[Changing the insights-client schedule](https://docs.redhat.com/en/documentation/red_hat_insights/1-latest/html/client_configuration_guide_for_red_hat_insights/assembly-client-changing-schedule)

[Unregistering your system with Red Hat Insights](https://docs.redhat.com/en/documentation/red_hat_insights/1-latest/html/client_configuration_guide_for_red_hat_insights/assembly-client-configuring-insights-client#proc-unregistering-system-insights_insights-cg-configuring-client)

[Configuring insights-client](https://docs.redhat.com/en/documentation/red_hat_insights/1-latest/html/client_configuration_guide_for_red_hat_insights/assembly-client-configuring-insights-client)

Is this issue a regression from an earlier version:

Steps to Reproduce:

1. Access the page [Chapter 6. Performing additional configuration on Satellite Server](https://docs.redhat.com/en/documentation/red_hat_satellite/6.18/html-single/installing_satellite_server_in_a_connected_network_environment/index#performing-additional-configuration-on-server_satellite) in 'Additional resources' and check the links

2. [Registering your system with Red Hat Insights](https://docs.redhat.com/en/documentation/red_hat_insights/1-latest/html/client_configuration_guide_for_red_hat_insights/assembly-client-configuring-insights-client#proc-registering-system-insights_insights-cg-configuring-client)

3. [Changing the insights-client schedule](https://docs.redhat.com/en/documentation/red_hat_insights/1-latest/html/client_configuration_guide_for_red_hat_insights/assembly-client-changing-schedule)

4. [Unregistering your system with Red Hat Insights](https://docs.redhat.com/en/documentation/red_hat_insights/1-latest/html/client_configuration_guide_for_red_hat_insights/assembly-client-configuring-insights-client#proc-unregistering-system-insights_insights-cg-configuring-client)

5. [Configuring insights-client](https://docs.redhat.com/en/documentation/red_hat_insights/1-latest/html/client_configuration_guide_for_red_hat_insights/assembly-client-configuring-insights-client)

Actual behavior:
Getting the error message: '404: Page not found'

Expected behavior:
Access the correct documentation from the Red Hat Lightspeed (old Red Hat Insights)

Business Impact / Additional info:

Medium