Sentinel - update index to add USX

AB#351302
AB#354698

Author: cwatson-cat

articles/sentinel/index.yml

@@ -51,8 +51,34 @@ landingContent:
       - linkListType: how-to-guide
         links:
           - text: Install solutions and content
-            url: sentinel-solutions-deploy.md          
-
+            url: sentinel-solutions-deploy.md  
+            
+  # Card
+  - title: Microsoft's unified security operations platform
+    linkLists:
+      - linkListType: overview
+        links:
+          - text: "What is Microsoft's unified SecOps platform?"
+            url: /unified-secops-platform/overview-unified-security
+          - text: "Microsoft Defender portal overview"
+            url: /unified-secops-platform/overview-defender-portal
+          - text: "Microsoft Sentinel in the Microsoft Defender portal"
+            url: microsoft-sentinel-defender-portal.md
+      - linkListType: whats-new
+        links:
+          - text: "What's new in Microsoft's unified SecOps platform"
+            url: /unified-secops-platform/whats-new.md
+      - linkListType: deploy
+        links:
+          - text: "Plan your deployment"
+            url: /unified-secops-platform/overview-plan
+          - text: "Deploy Microsoft's unified SecOps platform"
+            url: /unified-secops-platform/overview-deploy
+      - linkListType: how-to-guide
+        links:
+          - text: Connect Microsoft Sentinel to the Microsoft Defender portal
+            url: /defender-xdr/microsoft-sentinel-onboard?toc=%2Funified-secops-platform%2Ftoc.json&bc=%2Funified-secops-platform%2Fbreadcrumb%2Ftoc.json 
+            
   # Card
   - title: Collect data
     linkLists:
@@ -105,7 +131,7 @@ landingContent:
             url: detect-threats-custom.md
 
  # Card (optional)
-  - title: Investigate
+  - title: Investigate and respond
     linkLists:
       - linkListType: concept
         links:
@@ -115,10 +141,16 @@ landingContent:
             url: hunting.md
           - text: Kusto Query Language in Microsoft Sentinel
             url: kusto-overview.md
+          - text: Automation rules
+            url: automate-incident-handling-with-automation-rules.md
+          - text: Playbooks
+            url: automate-responses-with-playbooks.md
       - linkListType: tutorial
         links:
         - text: Investigate with UEBA
           url: investigate-with-ueba.md
+        - text: Respond automatically to threats
+          url: tutorial-respond-threats-playbook.md
       - linkListType: how-to-guide
         links:
           - text: Investigate incidents
@@ -130,17 +162,4 @@ landingContent:
           - text: Conduct end-to-end threat hunting
             url: hunts.md
 
-# Card (optional)
-  - title: Respond
-    linkLists:
-      - linkListType: concept
-        links:
-          - text: Automation rules
-            url: automate-incident-handling-with-automation-rules.md
-          - text: Playbooks
-            url: automate-responses-with-playbooks.md
-      - linkListType: tutorial
-        links:
-        - text: Respond automatically to threats
-          url: tutorial-respond-threats-playbook.md