chore(deps): bump vitest and @vitest/coverage-istanbul to v4.1.8

[Daryna-del]

What/Why/How?

Bump vitest and @vitest/coverage-istanbul to 4.1.8

Reference

https://github.com/Redocly/redocly-cli/security/dependabot/136

Testing

Screenshots (optional)

Check yourself

• This PR follows the contributing guide
• All new/updated code is covered by tests
• Core code changed? - Tested with other Redocly products (internal contributions only)
• New package installed? - Tested in different environments (browser/node)
• Documentation update has been considered

Security

• The security impact of the change has been considered
• Code follows company security practices and guidelines

---

Note

Low Risk
Dev-only dependency patch with no runtime or application logic changes; risk is limited to test/coverage tooling behavior in CI.

Overview
Bumps vitest and @vitest/coverage-istanbul to 4.1.8 in root devDependencies (and the lockfile), addressing Dependabot alert #136. No test config, scripts, or product code changes—only the test runner and Istanbul coverage plugin versions used by npm run unit / npm run e2e and CI coverage reporting.

^{Reviewed by Cursor Bugbot for commit ad01f9c. Bugbot is set up for automated code reviews on this repo. Configure here.}

[changeset-bot]

⚠️ No Changeset found

Latest commit: ad01f9c

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

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[github-actions]

Coverage Report

Status	Category	Percentage	Covered / Total
🔵	Lines	81.04% (🎯 80%)	7246 / 8941
🔵	Statements	80.39% (🎯 80%)	7528 / 9364
🔵	Functions	84.22% (🎯 83%)	1458 / 1731
🔵	Branches	72.63% (🎯 72%)	4899 / 6745

File Coverage

No changed files found.

Generated in workflow #10033 for commit ad01f9c by the Vitest Coverage Report Action

[github-actions]

Performance Benchmark (Lower is Faster)

CLI Version	Bundle	Lint	Check Config
cli-latest	▓ 1.00x ± 0.01	▓ 1.00x (Fastest)	▓ 1.00x ± 0.01
cli-next	▓ 1.00x (Fastest)	▓ 1.00x ± 0	▓ 1.00x (Fastest)

[tatomyr]

@Daryna-del Let's add a changeset.

[Daryna-del]

@Daryna-del Let's add a changeset.

It is not needed here