fix CI failed on macOS

[lidaobing]

Summary by Sourcery

CI:

• Upgrade GitHub Actions cache step to actions/cache@v4 in CI workflow.

[sourcery-ai]

Reviewer's Guide

This PR updates the GitHub Actions workflow by bumping the Homebrew cache action from v2 to v4 to leverage improvements and ensure compatibility.

File-Level Changes

Change	Details	Files
Updated cache action version	Replaced actions/cache@v2 with actions/cache@v4	.github/workflows/ci.yml

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[sourcery-ai]

Hey @lidaobing - I've reviewed your changes and they look great!

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[github-actions]

Test Results

66 tests  ±0   66 ✅ ±0   2s ⏱️ -1s
32 suites ±0    0 💤 ±0 
 1 files   ±0    0 ❌ ±0 

Results for commit 5e3dad3. ± Comparison against base commit d6a6433.

♻️ This comment has been updated with latest results.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 52.38%. Comparing base (d6a6433) to head (5e3dad3).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #682   +/-   ##
=======================================
  Coverage   52.38%   52.38%           
=======================================
  Files          64       64           
  Lines        8599     8599           
=======================================
  Hits         4505     4505           
  Misses       4094     4094           

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