chore(deps): bump Go version and update dependencies

[jferrl]

• Update Go version from 1.24.0 to 1.24.6
• Update GitHub Actions workflow to use Go 1.24.x instead of 1.23.x
• Bump github.com/google/go-github from v64.0.0 to v73.0.0
• Bump golang.org/x/time from v0.6.0 to v0.12.0
• Bump github.com/migueleliasweb/go-github-mock from v1.0.1 to v1.4.0
• Bump github.com/google/go-cmp from v0.6.0 to v0.7.0

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.75%. Comparing base (645982a) to head (e616973).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #16   +/-   ##
=======================================
  Coverage   93.75%   93.75%           
=======================================
  Files           1        1           
  Lines          96       96           
=======================================
  Hits           90       90           
  Misses          4        4           
  Partials        2        2           

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