chore(deps): update actions/checkout action to v4

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
actions/checkout	action	major	v3 -> v4

---

Release Notes

actions/checkout (actions/checkout)

v4

Compare Source

• Support fetching without the --progress option
• Update to node20

---

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, 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, check this box

---

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

[github-actions]

Benchmark for 84f3e39

Click to view benchmark

Test	Base	PR	%
benchmarks/big trees (deep + cached) + invalidated node in the bottom	88.1±5.28µs	81.1±6.53µs	-7.95%
benchmarks/big trees (deep + cached) + invalidated node in the middle	100.5±7.04µs	98.5±8.66µs	-1.99%
benchmarks/big trees (deep + cached) + invalidated node in the top	182.7±15.44µs	183.0±14.56µs	+0.16%
benchmarks/big trees (deep) nodes=10000, depth=14	134.1±11.88µs	140.6±11.84µs	+4.85%
benchmarks/big trees (deep) nodes=100000, depth=17	1321.5±80.94µs	1322.5±88.30µs	+0.08%
benchmarks/big trees (deep) nodes=4000, depth=12	75.0±6.49µs	75.2±6.32µs	+0.27%
benchmarks/big trees (wide) nodes=1000, depth=1	178.4±12.91µs	167.8±14.82µs	-5.94%
benchmarks/big trees (wide) nodes=10000, depth=1	2.0±0.14ms	2.1±0.16ms	+5.00%
benchmarks/big trees (wide) nodes=100000, depth=1	34.1±1.64ms	35.5±1.73ms	+4.11%

[codecov]

Codecov Report

All modified lines are covered by tests ✅

Comparison is base (d7d6896) 52.38% compared to head (e281ded) 52.38%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #336   +/-   ##
=======================================
  Coverage   52.38%   52.38%           
=======================================
  Files         130      130           
  Lines       11284    11284           
=======================================
  Hits         5911     5911           
  Misses       5373     5373           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.