Changes

#3995: Bump io.netty:netty-bom from 4.2.14.Final to 4.2.15.Final

Bumps [io.netty:netty-bom](https://github.com/netty/netty) from 4.2.14.Final to 4.2.15.Final.
- [Release notes](https://github.com/netty/netty/releases)
- [Commits](https://github.com/netty/netty/compare/netty-4.2.14.Final...netty-4.2.15.Final)

---
updated-dependencies:
- dependency-name: io.netty:netty-bom
  dependency-version: 4.2.15.Final
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
(commit: 517f5e8)