Bump pyasn1 from 0.6.1 to 0.6.3 in /Chapter09/realtime-marketplace-api

Bumps [pyasn1](https://github.com/pyasn1/pyasn1) from 0.6.1 to 0.6.3.
- [Release notes](https://github.com/pyasn1/pyasn1/releases)
- [Changelog](https://github.com/pyasn1/pyasn1/blob/main/CHANGES.rst)
- [Commits](pyasn1/pyasn1@v0.6.1...v0.6.3)

---
updated-dependencies:
- dependency-name: pyasn1
  dependency-version: 0.6.3
  dependency-type: indirect
...

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Author: dependabot[bot]