core_test: adjust testWorkflowHistoryList.TestDedup expected numbers

As per the discussion on nexedi/erp5!1378 (comment 131223)
what's important for this test is that the value is high. It seems the test
was not updated to the final version. We now have 35, not 36.

bt5/erp5_core_test/TestTemplateItem/portal_components/test.erp5.testWorkflowHistoryList.py

@@ -221,5 +221,5 @@ class TestDedup(ERP5TypeTestCase):
         whl._p_deactivate()
     finally:
       Workflow.dedupStrings = orig_dedupStrings
-    self.assertEqual(deduped, [36])
-    self.assertEqual(len(list(whl)), 37)
+    self.assertEqual(deduped, [35])
+    self.assertEqual(len(list(whl)), 36)