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

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
actions/checkout	action	major	v3 -> v4

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Release Notes

actions/checkout (actions/checkout)

v4

Compare Source

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

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Configuration

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[codecov]

Codecov Report

Merging #108 (7d0f8b0) into main (c7e619b) will decrease coverage by 27.61%.
Report is 1 commits behind head on main.
The diff coverage is n/a.

❗ Current head 7d0f8b0 differs from pull request most recent head f38dd8b. Consider uploading reports for the commit f38dd8b to get more accurate results

@@            Coverage Diff             @@
##             main    #108       +/-   ##
==========================================
- Coverage   35.29%   7.69%   -27.61%     
==========================================
  Files           4       4               
  Lines          34      26        -8     
  Branches        8       4        -4     
==========================================
- Hits           12       2       -10     
- Misses         22      24        +2     

see 3 files with indirect coverage changes

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