Fix variable typo in test case

Author: int3l

tests/pytesseract_test.py

@@ -292,7 +292,7 @@ def test_image_to_data_common_output(test_file_small, output):
         assert isinstance(result, bytes)
 
     elif output is Output.DICT:
-        confidence_values = expected_dict_result.pop('conf', None)
+        confidence_values = result.pop('conf', None)
         assert confidence_values is not None
         assert 0 <= confidence_values[-1] <= 100
         assert result == expected_dict_result