Update Go version to 1.26.1

[arnested]

Update Go version to 1.26.1.

See the release history.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 28.12%. Comparing base (b9e03a3) to head (111dac4).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #492   +/-   ##
=======================================
  Coverage   28.12%   28.12%           
=======================================
  Files           7        7           
  Lines         288      288           
=======================================
  Hits           81       81           
  Misses        205      205           
  Partials        2        2           

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