update install and walkthrough

mkdocs.yml

@@ -102,6 +102,8 @@ nav:
     - 'Single-Cluster': getting-started-single-cluster.md
     - 'Multi-Cluster': getting-started-multi-cluster.md
   - 'Architecture': architecture/docs/design/architectural-overview-v1.md
+  - 'Installation':
+    - 'OpenShift': kuadrant-operator/doc/install/install-openshift.md
   - 'Concepts and APIs':
     - 'DNSPolicy':
       - 'Reference': kuadrant-operator/doc/reference/dnspolicy.md
@@ -119,7 +121,7 @@ nav:
       - 'Overview': kuadrant-operator/doc/rate-limiting.md
       - 'Reference': kuadrant-operator/doc/reference/ratelimitpolicy.md
   - 'How-to Guides':
-    - 'Secure, connect and protect': kuadrant-operator/doc/user-guides/secure-protect-connect.md
+    - 'Secure, connect and protect': kuadrant-operator/doc/user-guides/secure-protect-connect-single-multi-cluster.md
     - 'DNS configuration and load balancing':
       - 'DNS Health Checks': kuadrant-operator/doc/dnshealthchecks.md
       # - 'DNS Providers': multicluster-gateway-controller/docs/dnspolicy/dns-provider.md # TODO: this seems to have been lost recently