Update AutoClassificationSearch docstring with correct command

[gsheni]

Pull Request Description

• The docstring had an incorrect command.
• Fixes AutoClassificationSearch allowed_model_familieis docstring incorrect #598

[jeremyliweishih]

Looks good! What do you think about standardizing the docstring so that it's the same on AutoRegressionSearch? Right now it only mentions the regression option.

[codecov]

Codecov Report

Merging #599 into master will increase coverage by 0.38%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #599      +/-   ##
==========================================
+ Coverage   98.49%   98.87%   +0.38%     
==========================================
  Files         118      118              
  Lines        4453     4453              
==========================================
+ Hits         4386     4403      +17     
+ Misses         67       50      -17     

Impacted Files	Coverage Δ
evalml/automl/auto_classification_search.py	100.00% <ø> (ø)
...ts/automl_tests/test_auto_classification_search.py	100.00% <0.00%> (+0.74%)	⬆️
evalml/automl/auto_base.py	96.19% <0.00%> (+1.03%)	⬆️
evalml/tests/component_tests/test_components.py	100.00% <0.00%> (+1.25%)	⬆️
evalml/tests/pipeline_tests/test_pipelines.py	99.63% <0.00%> (+1.83%)	⬆️
.../tests/automl_tests/test_auto_regression_search.py	100.00% <0.00%> (+2.06%)	⬆️
evalml/tests/component_tests/test_utils.py	96.42% <0.00%> (+3.57%)	⬆️
evalml/tests/utils_tests/test_dependencies.py	100.00% <0.00%> (+12.50%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 56aa951...4703f11. Read the comment docs.

[gsheni]

Looks good! What do you think about standardizing the docstring so that it's the same on AutoRegressionSearch? Right now it only mentions the regression option.

I think leave them different. The reason is because AutoClassificationSearch class shouldn't mention regression and vice versa. I fixed my PR to address this.

We can change the list_model_families to better explain the options if you want.