feat: Implement `azdo security group update` command

[tmeckel]

This issue tracks the implementation of the azdo security group update command.

Command Description

Update the name and/or description of an Azure DevOps security group.

azdo Command Signature

This command should support the following parameters:

• A positional argument in the format ORGANIZATION/GROUP or ORGANIZATION/PROJECT/GROUP to specify the scope and the name of the group to update. The organization is always required.
• --name: The new name for the group. (Optional)
• --description: The new description for the group. (Optional)

Constraint: At least one of --name or --description must be specified.