Bump vega from 5.30.0 to 5.32.0 in /packages/powerbi (#754)

Bumps [vega](https://github.com/vega/vega) from 5.30.0 to 5.32.0.
- [Release notes](https://github.com/vega/vega/releases)
- [Commits](vega/vega@v5.30.0...v5.32.0)

---
updated-dependencies:
- dependency-name: vega
  dependency-version: 5.32.0
  dependency-type: direct:production
...

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