Update container-registry-faq.md

Lines 49 and 118, corrected "Powershell" to "PowerShell"

Author: v-dihans

articles/container-registry/container-registry-faq.md

@@ -46,7 +46,7 @@ To get credentials using the Azure CLI:
 az acr credential show -n myRegistry
 ```
 
-Using Azure Powershell:
+Using Azure PowerShell:
 
 ```powershell
 Invoke-AzureRmResourceAction -Action listCredentials -ResourceType Microsoft.ContainerRegistry/registries -ResourceGroupName myResourceGroup -ResourceName myRegistry
@@ -115,7 +115,7 @@ If you are on bash:
 az acr repository show-manifests -n myRegistry --repository myRepository --query "[?tags[0]==null].digest" -o tsv  | xargs -I% az acr repository delete -n myRegistry -t myRepository@%
 ```
 
-For Powershell:
+For PowerShell:
 
 ```azurecli
 az acr repository show-manifests -n myRegistry --repository myRepository --query "[?tags[0]==null].digest" -o tsv | %{ az acr repository delete -n myRegistry -t myRepository@$_ }