Expand VM in VMSS

Author: vermagit

articles/virtual-machines/linux/sizes-hpc.md

@@ -78,7 +78,7 @@ Azure provides several options to create clusters of Linux HPC VMs that can comm
 
 * **Virtual machines**  - Deploy the RDMA-capable HPC VMs in the same availability set (when you use the Azure Resource Manager deployment model). If you use the classic deployment model, deploy the VMs in the same cloud service. 
 
-* **Virtual machine scale sets** - In a VM scale set, ensure that you limit the deployment to a single placement group. For example, in a Resource Manager template, set the `singlePlacementGroup` property to `true`. 
+* **Virtual machine scale sets** - In a virtual machine scale set, ensure that you limit the deployment to a single placement group. For example, in a Resource Manager template, set the `singlePlacementGroup` property to `true`. 
 
 * **Azure CycleCloud** - Create an HPC cluster in [Azure CycleCloud](/azure/cyclecloud/) to run MPI jobs on Linux nodes.