Merge pull request #11295 from Azure/doc/update/psversion-container

Add note about the version of PowerShell

Author: isra-fel

docker/README.md

@@ -15,7 +15,7 @@ Please follow [Docker's official instructions][install] to install `docker` corr
 
 ## Release
 
-The release containers derive from the [Powershell image][powershell image], and then install the current Az package.
+The release containers derive from the [Powershell image][powershell image], and then install the current Az package. The current images are using PowerShell 6.2.4, we are planning to add support for PowerShell 7 in the near future.
 
 [powershell image]: https://hub.docker.com/_/microsoft-powershell
 
@@ -99,4 +99,4 @@ For more information see the [Code of Conduct FAQ][conduct-FAQ] or contact [open
 
 [conduct-code]: http://opensource.microsoft.com/codeofconduct/
 [conduct-FAQ]: http://opensource.microsoft.com/codeofconduct/faq/
-[conduct-email]: mailto:[email protected]
+[conduct-email]: mailto:[email protected]