chore: update copyright header

[BlackAsLight]

Updates the header from 2025 to 2026. Happy New Year

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.17%. Comparing base (13e5527) to head (fdd25f0).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6925   +/-   ##
=======================================
  Coverage   94.17%   94.17%           
=======================================
  Files         584      584           
  Lines       43087    43087           
  Branches     6875     6875           
=======================================
  Hits        40578    40578           
  Misses       2457     2457           
  Partials       52       52           

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[BlackAsLight]

I'm not sure how to fix the crypto/_wasm test

[kt3k]

Thanks!