Fix typo in good_practices.md

[kevinshen56714]

Description

Fixes a typo

Types of changes

• Updated docs / Refactor code / Added a tests case (non-breaking change)
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.
• I have updated the changelog.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.11%. Comparing base (10c5de8) to head (20953c2).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1679   +/-   ##
=======================================
  Coverage   99.11%   99.11%           
=======================================
  Files          52       52           
  Lines        1363     1363           
  Branches      184      184           
=======================================
  Hits         1351     1351           
  Misses         11       11           
  Partials        1        1           

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