Update Network Security.json (#97)

Update Network Security Dashboard Name

Author: jujufugh

knowledge-content/MAP/security-fundamentals-dashboards/Network Security.json

@@ -877,7 +877,7 @@
           "description": null
         }
       ],
-      "displayName": "Network Security MultiTab_v2",
+      "displayName": "Network Security",
       "description": "Network Security",
       "compartmentId": "${compartment_ocid}",
       "isOobDashboard": false,
@@ -8184,4 +8184,4 @@
       "definedTags": {}
     }
   ]
-}
+}