Ramoka/mgrp 0928 s360 (Azure#22270)

* Add blockchain to latest profile

* Add additional types

* fixing nextlink

---------

Co-authored-by: Mark Cowlishaw <markcowl@microsoft.com>

Author: 2 people

specification/managementgroups/resource-manager/Microsoft.Management/stable/2021-04-01/examples/ListHierarchySettings.json

@@ -18,7 +18,7 @@
             }
           }
         ],
-        "nextLink": null
+        "@nextLink": null
       }
     }
   }

specification/managementgroups/resource-manager/Microsoft.Management/stable/2021-04-01/examples/ListManagementGroups.json

@@ -26,7 +26,7 @@
             }
           }
         ],
-        "nextLink": null
+        "@nextLink": null
       }
     }
   }

specification/managementgroups/resource-manager/Microsoft.Management/stable/2021-04-01/management.json

@@ -81,7 +81,7 @@
           }
         },
         "x-ms-pageable": {
-          "nextLinkName": "nextLink"
+          "nextLinkName": "@nextLink"
         },
         "x-ms-examples": {
           "ListManagementGroups": {
@@ -1073,7 +1073,7 @@
             "$ref": "#/definitions/ManagementGroupInfo"
           }
         },
-        "nextLink": {
+        "@nextLink": {
           "description": "The URL to use for getting the next set of results.",
           "type": "string",
           "readOnly": true
@@ -1479,7 +1479,7 @@
             "$ref": "#/definitions/HierarchySettingsInfo"
           }
         },
-        "nextLink": {
+        "@nextLink": {
           "description": "The URL to use for getting the next set of results.",
           "type": "string",
           "readOnly": true