paper update to mention text spotting

[kmcdono2]

Summary

Added sentence to related work to mention briefly that MapReader now includes text spotting.

Describe your changes

N/A

Checklist before assigning a reviewer (update as needed)

• Self-review code
• Ensure submission passes current tests
• Add tests
• Update relevant docs

Reviewer checklist

Please add anything you want reviewers to specifically focus/comment on.

• Everything looks ok?

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 62.43%. Comparing base (c6d078b) to head (6d68559).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #450      +/-   ##
==========================================
- Coverage   62.52%   62.43%   -0.09%     
==========================================
  Files          40       40              
  Lines        6780     6780              
==========================================
- Hits         4239     4233       -6     
- Misses       2541     2547       +6     

Flag	Coverage Δ
unittests	62.43% <ø> (-0.09%)	⬇️

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[rwood-97]

Suggested a minor change for that paragraph but otherwise all good.