fix: fixed contract name update logic

[0xbryer]

I corrected an issue where the update() method was incorrectly used with a list of tuples. Since we only need to update a single field, I replaced it with direct assignment. This prevents the TypeError and ensures contract names are updated correctly.

Also, I adjusted the remove_prefix_from_names function to reflect this fix.

PR Checklist

• Tests
• Documentation
• Added entry to CHANGELOG.md
• Tried the feature on a public network

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.41%. Comparing base (32dd529) to head (1f7a06d).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1344   +/-   ##
=======================================
  Coverage   89.41%   89.41%           
=======================================
  Files          81       81           
  Lines        3496     3496           
=======================================
  Hits         3126     3126           
  Misses        370      370           

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