chore(deps): update actions/checkout action to v4

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
actions/checkout	action	major	v2 -> v4

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Release Notes

actions/checkout (actions/checkout)

v4

Compare Source

• Support fetching without the --progress option
• Update to node20

v3

Compare Source

• Fix: Mark test scripts with Bash'isms to be run via Bash
• Add option to fetch tags even if fetch-depth > 0

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Configuration

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 83.93%. Comparing base (99968c5) to head (8c02f1e).
Report is 31 commits behind head on main.

❗ Current head 8c02f1e differs from pull request most recent head 123d10f

Please upload reports for the commit 123d10f to get more accurate results.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #353      +/-   ##
==========================================
- Coverage   85.20%   83.93%   -1.28%     
==========================================
  Files          37       37              
  Lines         669      697      +28     
  Branches      203      216      +13     
==========================================
+ Hits          570      585      +15     
- Misses         95      107      +12     
- Partials        4        5       +1     

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