Bump openapi-to-postmanv2 from 4.12.0 to 4.13.0

Bumps [openapi-to-postmanv2](https://github.com/postmanlabs/openapi-to-postman) from 4.12.0 to 4.13.0.
- [Release notes](https://github.com/postmanlabs/openapi-to-postman/releases)
- [Changelog](https://github.com/postmanlabs/openapi-to-postman/blob/develop/CHANGELOG.md)
- [Commits](postmanlabs/openapi-to-postman@v4.12.0...v4.13.0)

---
updated-dependencies:
- dependency-name: openapi-to-postmanv2
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]