[Doc-Release-2.8] fixed broken module links in 2.8 porting guide (#56494)

* fixed broken module links

docs/docsite/rst/porting_guides/porting_guide_2.8.rst

@@ -236,16 +236,16 @@ The following modules will be removed in Ansible 2.12. Please update your playbo
 * ``foreman`` use `foreman-ansible-modules <https://github.com/theforeman/foreman-ansible-modules>`_ instead.
 * ``katello`` use `foreman-ansible-modules <https://github.com/theforeman/foreman-ansible-modules>`_ instead.
 * ``github_hooks`` use :ref:`github_webhook <github_webhook_module>` and :ref:`github_webhook_facts <github_webhook_facts_module>` instead.
-* ``digital_ocean`` use :ref `digital_ocean_droplet <digital_ocean_droplet_module>` instead.
-* ``gce`` use :ref `gcp_compute_instance <gcp_compute_instance_module>` instead.
-* ``gcspanner`` use :ref `gcp_spanner_instance <gcp_spanner_instance_module>` and :ref `gcp_spanner_database <gcp_spanner_database_module>` instead.
-* ``gcdns_record`` use :ref `gcp_dns_resource_record_set <gcp_dns_resource_record_set_module>` instead.
-* ``gcdns_zone`` use :ref `gcp_dns_managed_zone <gcp_dns_managed_zone_module>` instead.
-* ``gcp_forwarding_rule`` use :ref `gcp_compute_global_forwarding_rule <gcp_compute_global_forwarding_rule_module>` or :ref `gcp_compute_forwarding_rule <gcp_compute_forwarding_rule_module>` instead.
-* ``gcp_healthcheck`` use :ref `gcp_compute_health_check <gcp_compute_health_check__module>`, :ref `gcp_compute_http_health_check <gcp_compute_http_health_check_module>`, or :ref `gcp_compute_https_health_check <gcp_compute_https_health_check_module>` instead.
-* ``gcp_backend_service`` use :ref `gcp_compute_backend_service <gcp_compute_backend_service_module>` instead.
-* ``gcp_target_proxy`` use :ref `gcp_compute_target_proxy <gcp_compute_target_proxy_module>` instead.
-* ``gcp_url_map`` use :ref `gcp_compute_url_map <gcp_compute_url_map_module>` instead.
+* ``digital_ocean`` use :ref:`digital_ocean_droplet <digital_ocean_droplet_module>` instead.
+* ``gce`` use :ref:`gcp_compute_instance <gcp_compute_instance_module>` instead.
+* ``gcspanner`` use :ref:`gcp_spanner_instance <gcp_spanner_instance_module>` and :ref:`gcp_spanner_database <gcp_spanner_database_module>` instead.
+* ``gcdns_record`` use :ref:`gcp_dns_resource_record_set <gcp_dns_resource_record_set_module>` instead.
+* ``gcdns_zone`` use :ref:`gcp_dns_managed_zone <gcp_dns_managed_zone_module>` instead.
+* ``gcp_forwarding_rule`` use :ref:`gcp_compute_global_forwarding_rule <gcp_compute_global_forwarding_rule_module>` or :ref:`gcp_compute_forwarding_rule <gcp_compute_forwarding_rule_module>` instead.
+* ``gcp_healthcheck`` use :ref:`gcp_compute_health_check <gcp_compute_health_check_module>`, :ref:`gcp_compute_http_health_check <gcp_compute_http_health_check_module>`, or :ref:`gcp_compute_https_health_check <gcp_compute_https_health_check_module>` instead.
+* ``gcp_backend_service`` use :ref:`gcp_compute_backend_service <gcp_compute_backend_service_module>` instead.
+* ``gcp_target_proxy`` use :ref:`gcp_compute_target_http_proxy <gcp_compute_target_http_proxy_module>` instead.
+* ``gcp_url_map`` use :ref:`gcp_compute_url_map <gcp_compute_url_map_module>` instead.
 * ``panos`` use the `Palo Alto Networks Ansible Galaxy role <https://galaxy.ansible.com/PaloAltoNetworks/paloaltonetworks>`_ instead.