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

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
actions/checkout	action	major	v5 → v6

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Release Notes

actions/checkout (actions/checkout)

v6

Compare Source

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Configuration

📅 Schedule: Branch creation - "on the first day of the month" (UTC), Automerge - At any time (no schedule defined).

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🔕 Ignore: Close this PR and you won't be reminded about this update again.

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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 75.99%. Comparing base (361db49) to head (7adbc0d).

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #635      +/-   ##
==========================================
+ Coverage   75.94%   75.99%   +0.05%     
==========================================
  Files          73       73              
  Lines        5974     5974              
==========================================
+ Hits         4537     4540       +3     
  Misses       1053     1053              
+ Partials      384      381       -3     

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud