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 lines are covered by tests ✅

Comparison is base (3e793cf) 81.77% compared to head (bfac3ad) 81.77%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #571   +/-   ##
=======================================
  Coverage   81.77%   81.77%           
=======================================
  Files          30       30           
  Lines        1240     1240           
  Branches       44       44           
=======================================
  Hits         1014     1014           
  Misses        226      226           

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