Bump body-parser and express in /functions

Bumps [body-parser](https://github.com/expressjs/body-parser) and [express](https://github.com/expressjs/express). These dependencies needed to be updated together.

Updates `body-parser` from 1.19.0 to 1.20.6
- [Release notes](https://github.com/expressjs/body-parser/releases)
- [Changelog](https://github.com/expressjs/body-parser/blob/master/HISTORY.md)
- [Commits](expressjs/body-parser@1.19.0...1.20.6)

Updates `express` from 4.17.1 to 4.22.2
- [Release notes](https://github.com/expressjs/express/releases)
- [Changelog](https://github.com/expressjs/express/blob/v4.22.2/History.md)
- [Commits](expressjs/express@4.17.1...v4.22.2)

---
updated-dependencies:
- dependency-name: body-parser
  dependency-version: 1.20.6
  dependency-type: indirect
- dependency-name: express
  dependency-version: 4.22.2
  dependency-type: indirect
...

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Author: dependabot[bot]