Update actions/checkout action to v2.4.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
actions/checkout	action	minor	v2.3.5 -> v2.4.0

---

Release Notes

actions/checkout

v2.4.0

Compare Source

• Convert SSH URLs like org-<ORG_ID>@&#8203;github.com: to https://github.com/ - pr

---

Configuration

📅 Schedule: At any time (no schedule defined).

🚦 Automerge: Enabled.

♻ Rebasing: Whenever PR is behind base branch, or you tick the rebase/retry checkbox.

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

---

• If you want to rebase/retry this PR, click this checkbox.

---

This PR has been generated by WhiteSource Renovate. View repository job log here.

[codecov]

Codecov Report

Merging #170 (9998309) into main (a3a7a65) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##              main      #170   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            2         2           
  Lines          156       156           
=========================================
  Hits           156       156           

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update a3a7a65...9998309. Read the comment docs.