fixed other references to incorrect method name

[rekumar]

Summary

I fixed the code examples in the quickstart docs

Major changes:

• fix: There was a typo in the quickstart docs for the Builder code that did not raise an error but also rendered the example incorrect. The example subclass of Builder implemented a method .process_items instead of the correct method .process_item, resulting in no processing being applied. Hopefully this can save others some headache when getting started :)

Checklist

• [na] Google format doc strings added.
• [na] Code linted with ruff. (For guidance in fixing rule violates, see rule list)
• [na] Type annotations included. Check with mypy.
• [na] Tests added for new features/fixes.
• [ na] I have run the tests locally and they passed.

Tip: Install pre-commit hooks to auto-check types and linting before every commit:

pip install -U pre-commit
pre-commit install

[rkingsbury]

Thanks for catching, and fixing, @rekumar !

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.91%. Comparing base (7c4f066) to head (369accd).
Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1033   +/-   ##
=======================================
  Coverage   88.91%   88.91%           
=======================================
  Files          46       46           
  Lines        3997     3997           
=======================================
  Hits         3554     3554           
  Misses        443      443           

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