Update container-registry-get-started-powershell.md

Line 2, corrected "Powershell" to "PowerShell"

Author: v-dihans

articles/container-registry/container-registry-get-started-powershell.md

@@ -1,5 +1,5 @@
 ---
-title: Quickstart - Create registry - Powershell
+title: Quickstart - Create registry - PowerShell
 description: Quickly learn to create a private Docker registry in Azure Container Registry with PowerShell
 ms.topic: quickstart
 ms.date: 01/22/2019