Add redirection entries for secops files in /defender-xdr/

Author: garycentric

.openpublishing.redirection.defender-xdr.json

@@ -0,0 +1,39 @@
+{
+  "redirections": [
+    {
+      "source_path": "defender-xdr/unified-secops-platform/defender-xdr-portal.md",
+      "redirect_url": "/defender-xdr/unified-secops-platform/defender-xdr-portal",
+      "redirect_document_id": false
+    },
+    {
+      "source_path": "defender-xdr/unified-secops-platform/incident-response-overview.md",
+      "redirect_url": "/defender-xdr/unified-secops-platform/incident-response-overview",
+      "redirect_document_id": false
+    },
+    {
+      "source_path": "defender-xdr/unified-secops-platform/incident-response-planning.md",
+      "redirect_url": "/defender-xdr/unified-secops-platform/incident-response-planning",
+      "redirect_document_id": false
+    },
+    {
+      "source_path": "defender-xdr/unified-secops-platform/index.yml",
+      "redirect_url": "/defender-xdr/unified-secops-platform/index",
+      "redirect_document_id": false
+    },
+    {
+      "source_path": "defender-xdr/unified-secops-platform/overview-defender-portal.md",
+      "redirect_url": "/defender-xdr/unified-secops-platform/overview-defender-portal",
+      "redirect_document_id": false
+    },
+    {
+      "source_path": "defender-xdr/unified-secops-platform/overview-unified-security.md",
+      "redirect_url": "/defender-xdr/unified-secops-platform/overview-unified-security",
+      "redirect_document_id": false
+    },
+    {
+      "source_path": "defender-xdr/unified-secops-platform/whats-new.md",
+      "redirect_url": "/defender-xdr/unified-secops-platform/whats-new",
+      "redirect_document_id": false
+    }
+  ]
+}