Update actions/checkout

[vincentmr]

Before submitting

Please complete the following checklist when submitting a PR:

• All new features must include a unit test.
  If you've fixed a bug or added code that should be tested, add a test to the
  tests directory!

• All new functions and code must be clearly commented and documented.
  If you do make documentation changes, make sure that the docs build and
  render correctly by running make docs.

• Ensure that the test suite passes, by running make test.

• Add a new entry to the .github/CHANGELOG.md file, summarizing the
  change, and including a link back to the PR.

• Ensure that code is properly formatted by running make format.

When all the above are checked, delete everything above the dashed
line and fill in the pull request template.

---

Context:
Many actions are outdated which triggers a lot of warnings. See here for example.

Description of the Change:
Update some of the actions, those that do not introduce options requiring more in depth changes.

Benefits:

Possible Drawbacks:

Related GitHub Issues:
Update GitHub actions in the Lightning repo [sc-60944]

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.92%. Comparing base (c3fefb2) to head (c3c1851).

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #669      +/-   ##
==========================================
+ Coverage   98.39%   98.92%   +0.52%     
==========================================
  Files         172      206      +34     
  Lines       25166    29424    +4258     
==========================================
+ Hits        24763    29107    +4344     
+ Misses        403      317      -86     

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[AmintorDusko]

Happy to see our actions up-to-date. Thank you, @vincentmr!

[maliasadi]

🙌