Fixed property names (Azure#17222)

Author: omrodrig

specification/cost-management/resource-manager/Microsoft.CostManagement/stable/2021-10-01/costmanagement.json

@@ -1361,11 +1361,11 @@
           "description": "The logical \"NOT\" expression.",
           "$ref": "#/definitions/ReportConfigFilter"
         },
-        "dimension": {
+        "dimensions": {
           "description": "Has comparison expression for a dimension",
           "$ref": "#/definitions/ReportConfigComparisonExpression"
         },
-        "tag": {
+        "tags": {
           "description": "Has comparison expression for a tag",
           "$ref": "#/definitions/ReportConfigComparisonExpression"
         }