Bump express and @tbdex/http-server in /javascript/pfi-guide-example

Bumps [express](https://github.com/expressjs/express) to 4.19.2 and updates ancestor dependency [@tbdex/http-server](https://github.com/TBD54566975/tbdex-js/tree/HEAD/packages/http-server). These dependencies need to be updated together.


Updates `express` from 4.18.2 to 4.19.2
- [Release notes](https://github.com/expressjs/express/releases)
- [Changelog](https://github.com/expressjs/express/blob/master/History.md)
- [Commits](expressjs/express@4.18.2...4.19.2)

Updates `@tbdex/http-server` from 0.18.0 to 1.0.2
- [Release notes](https://github.com/TBD54566975/tbdex-js/releases)
- [Changelog](https://github.com/TBD54566975/tbdex-js/blob/main/packages/http-server/CHANGELOG.md)
- [Commits](https://github.com/TBD54566975/tbdex-js/commits/@tbdex/[email protected]/packages/http-server)

---
updated-dependencies:
- dependency-name: express
  dependency-type: indirect
- dependency-name: "@tbdex/http-server"
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>