Modifying the permission level of a site with ps [closed]

Question

I wrote a powershell script and I would like you to varify if it is a good one.

So the goal of this script is that it will retrieve a specific site and will modify the name of a persmission level, so the permission shouldn't be adjusted only the name.

The thing is I have a permission with a strange name there, so I need to update it to a more reasonable name.

Here is the code that I have:

function ModifyPermissionForSite()
{
    $site=get-CsWebAppUrl()+"/SiteName"
    $web =site.RootWeb
    $roleCollection=$web.RollDefinitions
    $role=$roleCollection["Auto-generated Permission Level"]

    $role.Name="New Persmission level name"
    $web.Upate()
    Write-Host "$($role) is updated to a new value!" -ForegroundColor green
}