Sample Runbook written in powershell

gistfile1.txt

 param( 
    [OutputType([string[]])]
    
    [Parameter(Mandatory=$true)]
    [string] 
    $SPOSiteUrl      
)

Connect-PnPOnline -url $SPOSiteUrl -AppId 05f5eb20-13c1-4ce6-a992-bf697f03740a -AppSecret iCdfbFvD/mzkxvOH2JgY1afbZ6mf0zaDK+W3uzaNs8o=


$web = Get-PnPWeb

# $setHomePage = Set-PnPClientSidePage -Identity "Home" -CommentsEnabled:$false -LayoutType Home -HeaderType None -Publish

# Add or update items to BrandingSettings
$List = Get-PnPList -Web $web -Identity "BrandingSettings"
$data = @(
    [pscustomobject]@{Name="cssURL";Value="/sites/cts/Style Library/TeamSite/assets/main-bundle.css"}
    [pscustomobject]@{Name="vendorsURL";Value="/sites/cts/Style Library/TeamSite/assets/vendors~main-bundle.js"}
    [pscustomobject]@{Name="scriptURL";Value="/sites/cts/Style Library/TeamSite/assets/main-bundle.js"}
)
foreach ($item in $data) {
    $Name = $item.Name
    $Value = $item.Value

    # Find list item
    $item = Get-PnPListItem -Web $web -List $List -Query "<View><Query><Where><Eq><FieldRef Name='Title'/><Value Type='Text'>$Name</Value></Eq></Where></Query></View>"

    if ($item) {
        $setItem = Set-PnPListItem -Web $web -List $List -Identity $item -Values @{"value" = $Value }
        Write-Output ("Item updated")
    }
    else {
        $addedItem = Add-PnPListItem -Web $web -List $List -Values @{"Title" = $Name; "value" = $Value }
        Write-Output ("Item created")
    }
}


# Modify Planner.aspx
$pageTitle = $web.Title + " Planner Board"
$setPlannerPage = Set-PnPClientSidePage -Identity "Planner" -CommentsEnabled:$false -Title $pageTitle -Publish


Write-Output ("Finished Provisioning the site: " + $SPOSiteUrl)