chore(deps): update actions/checkout action to v6

[botty-mcbottington]

This PR contains the following updates:

Package	Type	Update	Change
actions/checkout	action	major	v5 -> v6

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Warning

Some dependencies could not be looked up. Check the Dependency Dashboard for more information.

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Release Notes

actions/checkout (actions/checkout)

v6

Compare Source

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 56.70%. Comparing base (700ad4f) to head (992122c).
⚠️ Report is 3 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #279   +/-   ##
=======================================
  Coverage   56.70%   56.70%           
=======================================
  Files          68       68           
  Lines        3894     3894           
=======================================
  Hits         2208     2208           
  Misses       1360     1360           
  Partials      326      326           

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