fix: examples/2-standard-multiple-api-specs/package.json & examples/2-standard-multiple-api-specs/package-lock.json to reduce vulnerabilities (#1075)

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-MULTER-10185673
- https://snyk.io/vuln/SNYK-JS-MULTER-10185675

Co-authored-by: snyk-bot <snyk-bot@snyk.io>

Author: cdimascio