Fix test after update to postal code validation in woodwork

[freddyaboulton]

Pull Request Description

Fix failure here: https://github.com/alteryx/evalml/runs/6760125434?check_suite_focus=true

Successful run here: https://github.com/alteryx/evalml/actions/runs/2449725492

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After creating the pull request: in order to pass the release_notes_updated check you will need to update the "Future Release" section of docs/source/release_notes.rst to include this pull request by adding :pr:123.

[codecov]

Codecov Report

Merging #3544 (7d4d5b3) into main (ee9d333) will increase coverage by 0.1%.
The diff coverage is 100.0%.

@@           Coverage Diff           @@
##            main   #3544     +/-   ##
=======================================
+ Coverage   99.7%   99.7%   +0.1%     
=======================================
  Files        335     335             
  Lines      33176   33178      +2     
=======================================
+ Hits       33048   33050      +2     
  Misses       128     128             

Impacted Files	Coverage Δ
evalml/tests/component_tests/test_oversampler.py	100.0% <100.0%> (ø)

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[jeremyliweishih]

Thank you