chore: set js-yaml override to avoid vulnerability

[briantstephan]

This avoids the following vulnerability:

https://nvd.nist.gov/vuln/detail/CVE-2026-59869

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Repository UI

Review profile: CHILL

Plan: Pro Plus

Run ID: 9c3dd17c-5e7c-4b93-a2fa-eb9d05f6f45b

📥 Commits

Reviewing files that changed from the base of the PR and between 9b6a209 and cedf9ae.

⛔ Files ignored due to path filters (1)

• pnpm-lock.yaml is excluded by !**/pnpm-lock.yaml

📒 Files selected for processing (1)

• package.json

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Walkthrough

The pnpm.overrides configuration now explicitly pins js-yaml to version 4.3.0, while retaining the existing esbuild override at 0.28.1.

Suggested reviewers: benlife5, jwartofsky-yext, mkilpatrick, asanehisa

🚥 Pre-merge checks | ✅ 4

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly matches the change: adding a js-yaml override to address a vulnerability.
Description check	✅ Passed	The description is directly related to the change and cites the vulnerability being addressed.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch js-yaml-vuln

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