Sklearn normalize depreciation fix

[namanmistry]

Description

The new version of sklearn's LinearRegression does not allow normalize paramter which is depreciated in the newer versions. So I fixed that.

Related issues or pull requests

Fixes Arg normalize to sklearn.linear_model.LinearRegression has been removed in version 1.2 #1035

Pull Request Checklist

• Added a note about the modification or contribution to the ./docs/sources/CHANGELOG.md file (if applicable)
• Added appropriate unit test functions in the ./mlxtend/*/tests directories (if applicable)
• Modify documentation in the corresponding Jupyter Notebook under mlxtend/docs/sources/ (if applicable)
• 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)
• Checked for style issues by running flake8 ./mlxtend

[codecov]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (a60f127) 77.27% compared to head (6279cc1) 77.27%.

❗ Current head 6279cc1 differs from pull request most recent head ea83ad6. Consider uploading reports for the commit ea83ad6 to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1036   +/-   ##
=======================================
  Coverage   77.27%   77.27%           
=======================================
  Files         200      200           
  Lines       11307    11307           
  Branches     1484     1484           
=======================================
  Hits         8737     8737           
  Misses       2351     2351           
  Partials      219      219           

Impacted Files	Coverage Δ
...end/regressor/tests/test_stacking_cv_regression.py	95.78% <100.00%> (ø)
...lxtend/regressor/tests/test_stacking_regression.py	97.21% <100.00%> (ø)

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[rasbt]

Thanks for the PR, it looks good to me! Just moved the Changelog entry to the right section and fixed the small typo (depreciated -> deprecated)