build(deps): bump qs from 6.14.2 to 6.15.2 in /extensions/copilot (#318275)

Bumps [qs](https://github.com/ljharb/qs) from 6.14.2 to 6.15.2.
- [Changelog](https://github.com/ljharb/qs/blob/main/CHANGELOG.md)
- [Commits](https://github.com/ljharb/qs/compare/v6.14.2...v6.15.2)

---
updated-dependencies:
- dependency-name: qs
  dependency-version: 6.15.2
  dependency-type: indirect
...

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