update test skip message

Author: cxznmhdcxz

src/azure-cli/azure/cli/command_modules/vm/tests/latest/test_vm_commands.py

@@ -6840,7 +6840,7 @@ def test_vm_disk_encryption_with_encryption_identity_e2e(self, resource_group, r
         self.cmd('vm encryption show -g {rg} -n {vm}', checks=[self.check('disks[0].statuses[0].code', 'EncryptionState/encrypted')])
 
 
-    @unittest.skip('skip for now')
+    @unittest.skip('need feature for this scenario')
     @AllowLargeResponse(size_kb=99999)
     @ResourceGroupPreparer(name_prefix='cli_test_vm_encryption_identity_set_at_encryption_cmdlet', location='westus')
     @KeyVaultPreparer(name_prefix='vault', name_len=10, key='vault',