ci(.github/workflows/integration): add 'spec' to matrix command for quality checks

[sukvvon]

Overview

• This ensures that even when only test-related files are modified, we still run existing tests to verify system stability—just like in the following PR:
  • test(useDoubleClick): remove 'vi.clearAllTimers' #227
• This helps prevent unintended regressions caused by changes in test files.

Checklist

• Did you write the test code?
• Have you run yarn run fix to format and lint the code and docs?
• Have you run yarn run test:coverage to make sure there is no uncovered line?
• Did you write the JSDoc?

[seungrodotlee]

Thanks! 👍