chore(deps): bump the npm_and_yarn group across 1 directory with 2 up…

…dates (#780)

Bumps the npm_and_yarn group with 1 update in the /site directory: [express](https://github.com/expressjs/express).


Updates `express` from 4.19.2 to 4.20.0
- [Release notes](https://github.com/expressjs/express/releases)
- [Changelog](https://github.com/expressjs/express/blob/master/History.md)
- [Commits](expressjs/express@4.19.2...4.20.0)

Updates `serve-static` from 1.15.0 to 1.16.0
- [Release notes](https://github.com/expressjs/serve-static/releases)
- [Changelog](https://github.com/expressjs/serve-static/blob/master/HISTORY.md)
- [Commits](expressjs/serve-static@v1.15.0...1.16.0)

---
updated-dependencies:
- dependency-name: express
  dependency-type: indirect
  dependency-group: npm_and_yarn
- dependency-name: serve-static
  dependency-type: indirect
  dependency-group: npm_and_yarn
...

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