chore(deps): bump on-headers and morgan in /examples/6-multi-file-spec (#1103)

Bumps [on-headers](https://github.com/jshttp/on-headers) to 1.1.0 and updates ancestor dependency [morgan](https://github.com/expressjs/morgan). These dependencies need to be updated together.


Updates `on-headers` from 1.0.2 to 1.1.0
- [Release notes](https://github.com/jshttp/on-headers/releases)
- [Changelog](https://github.com/jshttp/on-headers/blob/master/HISTORY.md)
- [Commits](jshttp/on-headers@v1.0.2...v1.1.0)

Updates `morgan` from 1.10.0 to 1.10.1
- [Release notes](https://github.com/expressjs/morgan/releases)
- [Changelog](https://github.com/expressjs/morgan/blob/master/HISTORY.md)
- [Commits](expressjs/morgan@1.10.0...1.10.1)

---
updated-dependencies:
- dependency-name: on-headers
  dependency-version: 1.1.0
  dependency-type: indirect
- dependency-name: morgan
  dependency-version: 1.10.1
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]