(Azure CXP) resolves MicrosoftDocs/azure-docs#38802

Changed the command header from bash to powershell in https://docs.microsoft.com/en-us/azure/virtual-machines/windows/instance-metadata-service#retrieving-metadata-in-windows-virtual-machine this portion of document.

Author: VikasPullagura-MSFT

articles/virtual-machines/windows/instance-metadata-service.md

@@ -261,7 +261,7 @@ curl -H Metadata:true "http://169.254.169.254/metadata/instance?api-version=2019
 
 Instance metadata can be retrieved in Windows via the `curl` program:
 
-```bash
+```powershell
 curl -H @{'Metadata'='true'} http://169.254.169.254/metadata/instance?api-version=2019-03-11 | select -ExpandProperty Content
 ```