chore(deps): npm audit fix - 20260603 (BabylonJS#18531)

Automated by the morning-dev-briefing skill.

## Summary
`npm audit fix` resolved the following findings:
- Critical: 0
- High:     1
- Moderate: 0

Remaining audit findings after the fix:
- Critical: 0
- High:     0
- Moderate: 4

## Verification
- [ ] CI green
- [ ] No runtime regressions in dev host
- [ ] Lockfile diff reviewed

Run locally: `npm install && npm audit`

Author: RaananW