updated disconnected installation section

Closes: #150
Signed-off-by: Robert Guske <robert.guske@gmail.com>

Author: rguske

content/cluster-installation/disconnected/assets/.DS_Store

@@ -1,5 +1,5 @@
 ---
-title: Air-gapped/Disconnected
+title: Air-gapped/Disconnected Operator Handling
 linktitle: Air-gapped/Disconnected
 description: Some informations around OLM and Air-gapped/Disconnected
 tags: ['OLM','air-gapped','v4.17','v4.18','v4.19','operators']

content/cluster-installation/disconnected/assets/disco-cluster-operators.png

@@ -119,7 +119,9 @@ extra_css:
 nav:
   - Cluster installation:
       - cluster-installation/index.md
-      - Air-gapped: cluster-installation/air-gapped.md
+      - Air-gapped/Disconnected:
+          - "Cluster Installation": cluster-installation/disconnected/disconnected-installation.md
+          - "Operator Installation": cluster-installation/disconnected/disconnected-operators.md
       - SNO on OCP-V: cluster-installation/sno-on-ocpv/index.md
       - Agent-based (proxy): cluster-installation/agent-base-proxy/index.md
       - VMware/vSphere: