adding KMS to json config doc

Author: SummerSmith

AKS-Arc/aks-edge-deployment-config-json.md

@@ -21,6 +21,7 @@ You can find the complete JSON schema file at `C:\Program Files\AksEdge\aksedge-
 | `DeploymentType` |[`SingleMachineCluster` / `ScalableCluster`]| Specifies deployment type. In `ScalableCluster`, you can add more machines to the cluster infrastructure. | `SingleMachineCluster` |Single-machine and full deployment|
 | `Init.ServiceIPRangeStart` |IPv4 address `A.B.C.x`.|Reserved IP start address for your Kubernetes services. This IP range must be free on your subnet **A.B.C.0**.| None |Single-machine and full deployment|
 | `Init.ServiceIPRangeSize` |`[0-127]`|Number of reserved IP start addresses for your Kubernetes services. Based on the size, we allocate a range of free IP addresses on your subnet. | `0` |Single-machine and full deployment|
+| `Init.KmsPlugin.Enable` | Boolean | Specifies whether the KMS plugin is enabled or not. | false | Single-machine and full deployment|
 | `Join.ClusterJoinToken` |String|`Reserved` | None |Full deployment only|
 | `Join.DiscoveryTokenHash` |String|`Reserved`| None |Full deployment only|
 | `Join.CertificateKey` |String|`Reserved`| None |Full deployment only|