Unify pester test syntax for the arguments of -BeOfType (#11558)

test/powershell/Modules/Microsoft.PowerShell.Security/AclCmdlets.Tests.ps1

@@ -3,7 +3,7 @@
 Describe "Acl cmdlets are available and operate properly" -Tag CI {
     It "Get-Acl returns an ACL object" -pending:(!$IsWindows) {
         $ACL = get-acl $TESTDRIVE
-        $ACL | Should -BeOfType "System.Security.AccessControl.DirectorySecurity"
+        $ACL | Should -BeOfType System.Security.AccessControl.DirectorySecurity
     }
     It "Set-Acl can set the ACL of a directory" -pending {
         Setup -d testdir

test/powershell/Modules/Microsoft.PowerShell.Security/ExecutionPolicy.Tests.ps1

@@ -565,7 +565,7 @@ ZoneId=$FileType
 
                     $exception = { & $scriptName } | Should -Throw -PassThru
 
-                    $exception.Exception | Should -BeOfType "System.Management.Automation.PSSecurityException"
+                    $exception.Exception | Should -BeOfType System.Management.Automation.PSSecurityException
                 }
             }