Bump net.bytebuddy:byte-buddy-agent in /data-prepper-plugins/opensearch (opensearch-project#6378)

Bumps [net.bytebuddy:byte-buddy-agent](https://github.com/raphw/byte-buddy) from 1.17.8 to 1.18.3.
- [Release notes](https://github.com/raphw/byte-buddy/releases)
- [Changelog](https://github.com/raphw/byte-buddy/blob/master/release-notes.md)
- [Commits](raphw/byte-buddy@byte-buddy-1.17.8...byte-buddy-1.18.3)

---
updated-dependencies:
- dependency-name: net.bytebuddy:byte-buddy-agent
  dependency-version: 1.18.3
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]