chore(deps): bump multer in /examples/2-standard-multiple-api-specs

Bumps [multer](https://github.com/expressjs/multer) from 2.0.1 to 2.1.1.
- [Release notes](https://github.com/expressjs/multer/releases)
- [Changelog](https://github.com/expressjs/multer/blob/main/CHANGELOG.md)
- [Commits](expressjs/multer@v2.0.1...v2.1.1)

---
updated-dependencies:
- dependency-name: multer
  dependency-version: 2.1.1
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]