build(deps): bump protocol-buffers-schema in /frontend

Bumps [protocol-buffers-schema](https://github.com/mafintosh/protocol-buffers-schema) from 3.6.0 to 3.6.1.
- [Commits](mafintosh/protocol-buffers-schema@v3.6.0...v3.6.1)

---
updated-dependencies:
- dependency-name: protocol-buffers-schema
  dependency-version: 3.6.1
  dependency-type: indirect
...

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Author: dependabot[bot]