Fixed load_boston test_exhaustive_feature_selector

[namanmistry]

Description

I have fixed the one error in test_exhaustive_feature_selector.py regarding sklearn depreciation in version 1.2

Related issues or pull requests

Fixes one of the issue of #889

Pull Request Checklist

• [x] Added a note about the modification or contribution to the ./docs/sources/CHANGELOG.md file (if applicable)
• [x] Added appropriate unit test functions in the ./mlxtend/*/tests directories (if applicable)
• [x] Modify documentation in the corresponding Jupyter Notebook under mlxtend/docs/sources/ (if applicable)
• [x] Ran PYTHONPATH='.' pytest ./mlxtend -sv and make sure that all unit tests pass (for small modifications, it might be sufficient to only run the specific test file, e.g., PYTHONPATH='.' pytest ./mlxtend/classifier/tests/test_stacking_cv_classifier.py -sv)
• [x] Checked for style issues by running flake8 ./mlxtend

[codecov[bot]]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (a60f127) 77.27% compared to head (57586c6) 77.27%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #1037 +/- ## ======================================= Coverage 77.27% 77.27% ======================================= Files 200 200 Lines 11307 11308 +1 Branches 1484 1484 ======================================= + Hits 8737 8738 +1 Misses 2351 2351 Partials 219 219 ``` | [Impacted Files](https://app.codecov.io/gh/rasbt/mlxtend/pull/1037?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Sebastian+Raschka) | Coverage Δ | | |---|---|---| | [...election/tests/test\_exhaustive\_feature\_selector.py](https://app.codecov.io/gh/rasbt/mlxtend/pull/1037?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Sebastian+Raschka#diff-bWx4dGVuZC9mZWF0dXJlX3NlbGVjdGlvbi90ZXN0cy90ZXN0X2V4aGF1c3RpdmVfZmVhdHVyZV9zZWxlY3Rvci5weQ==) | `83.75% <100.00%> (+0.05%)` | :arrow_up: |

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[rasbt]

Thanks a lot for the PR!!