Set Content Editor Web Part (CEWP) Content with PowerShell

Add-PSSnapin Microsoft.SharePoint.PowerShell -ErrorAction SilentlyContinue

#Get the Site collection
$site=Get-SPSite "https://sharepoint.crescent.com/PMO/"

#Loop throgh each subsite in the site collection
foreach($web in $Site.AllWebs)
{
  #Get the Default.aspx file
  $file= $web.GetFile($web.Url +"/SitePages/Home.aspx")

  if($file.Exists)
    {
     #Web Part Manager to get all web parts from the file
     $WebPartManager = $web.GetLimitedWebPartManager( $file,  [System.Web.UI.WebControls.WebParts.PersonalizationScope]::Shared)
 
     #Iterate through each web part
     foreach($webPart in $WebPartManager.WebParts) 
      {
        # Get the Content Editor web part with specific Title
        if( ($webPart.title -eq "Dashboard Links") -and ($webPart.GetType() -eq [Microsoft.SharePoint.WebPartPages.ContentEditorWebPart]) )
        {
           #Content to be Placed inside CEWP
           $HtmlContent= "<ul><li><a href='/pmo/dashboard/team-allocation.aspx'>PMO Team Allocation</a></li><li><a href='/pmo/dashboard/bi-dashboard.aspx'>PMO Business Intelligence Dashboard</a></li><li><a href='/pmo/dashboard/pmi-admin.aspx'>PMO PMIS Admin</a></li><li><a href='/pmo/dashboard/pmo-yammer.aspx'>PMO on Yammer</a></li></ul>"

           $XmlDoc = New-Object System.Xml.XmlDocument
     $contentXml=$xmlDoc.CreateElement("content") 
           $contentXml.InnerText= $HtmlContent

           #Set content and Save
           $webpart.Content = $contentXml     
           $webPartManager.SaveChanges($webPart);
         }
      }
    }
 }