Fix link

Author: aneta-petrova

guides/common/modules/proc_opening-required-ports.adoc

@@ -79,5 +79,5 @@ endif::[]
 .Additional resources
 * {PlanningDocURL}networking-considerations-in-{project-context}[Networking considerations in {Project}]
 ifndef::foreman-deb[]
-* https://docs.redhat.com/en/documentation/red_hat_enterprise_linux/9/html/configuring_firewalls_and_packet_filters/using-and-configuring-firewalld_firewall-packet-filters/9/html/configuring_firewalls_and_packet_filters/using-and-configuring-firewalld_firewall-packet-filters[Using and configuring firewalld in _{RHEL}{nbsp}9 Configuring firewalls and packet filters_]
+* https://docs.redhat.com/en/documentation/red_hat_enterprise_linux/9/html/configuring_firewalls_and_packet_filters/using-and-configuring-firewalld_firewall-packet-filters/[Using and configuring firewalld in _{RHEL}{nbsp}9 Configuring firewalls and packet filters_]
 endif::[]