Make a relative redirect URI absolute when 'Authorization' header present (#6325)

test/powershell/Modules/Microsoft.PowerShell.Utility/WebCmdlets.Tests.ps1

@@ -363,6 +363,8 @@ $redirectTests = @(
 
     @{redirectType = 'TemporaryRedirect'; redirectedMethod = 'GET'}
     @{redirectType = 'RedirectKeepVerb'; redirectedMethod = 'GET'} # Synonym for TemporaryRedirect
+
+    @{redirectType = 'relative'; redirectedMethod = 'GET'}
 )
 
 $PendingCertificateTest = $false