Doc update: fix example kubernetes-vmas.json link
|Feature|Status|API Version|Example|Description|
|---|---|---|---|---|
-|Managed Disks|Beta|`vlabs`|[kubernetes-vmas.json](../../examples/disks-managed/kubernetes-vmss.json)|[Description](#feat-managed-disks)|
+|Managed Disks|Beta|`vlabs`|[kubernetes-vmas.json](../../examples/disks-managed/kubernetes-vmas.json)|[Description](#feat-managed-disks)|
|Calico Network Policy|Alpha|`vlabs`|[kubernetes-calico.json](../../examples/networkpolicy/kubernetes-calico.json)|[Description](#feat-calico)|
|Cilium Network Policy|Alpha|`vlabs`|[kubernetes-cilium.json](../../examples/networkpolicy/kubernetes-cilium.json)|[Description](#feat-cilium)|
|Custom VNET|Beta|`vlabs`|[kubernetesvnet-azure-cni.json](../../examples/vnet/kubernetesvnet-azure-cni.json)|[Description](#feat-custom-vnet)|
