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 #231 (f4a06f0) into master (33c675e) will not change coverage.
Report is 4 commits behind head on master.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #231   +/-   ##
=========================================
  Coverage     85.38%   85.38%           
  Complexity      152      152           
=========================================
  Files            17       17           
  Lines           746      746           
  Branches         57       57           
=========================================
  Hits            637      637           
  Misses           89       89           
  Partials         20       20           

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