Bump body-parser from 1.20.1 to 1.20.3 in /ps5-mqtt

Bumps [body-parser](https://github.com/expressjs/body-parser) from 1.20.1 to 1.20.3.
- [Release notes](https://github.com/expressjs/body-parser/releases)
- [Changelog](https://github.com/expressjs/body-parser/blob/master/HISTORY.md)
- [Commits](expressjs/body-parser@1.20.1...1.20.3)

---
updated-dependencies:
- dependency-name: body-parser
  dependency-type: direct:production
...

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