tests: ruff fix

Signed-off-by: Yves Bastide <yves@botify.com>

Author: ybastide

tests/test_simpleflow/test_canvas.py

@@ -410,7 +410,7 @@ def test_handle_not_all(self):
         agg_ex = AggregateException([ZeroDivisionError(), None, memory_error])
 
         def my_handler(ex, a, b=None):
-            return type(ex) == ZeroDivisionError
+            return isinstance(ex, ZeroDivisionError)
 
         with self.assertRaises(AggregateException) as new_agg_ex:
             agg_ex.handle(my_handler, 1, b=True)