Bump nettyVersion from 4.1.115.Final to 4.2.1.Final

Bumps `nettyVersion` from 4.1.115.Final to 4.2.1.Final.

Updates `io.netty:netty-handler` from 4.1.115.Final to 4.2.1.Final
- [Commits](netty/netty@netty-4.1.115.Final...netty-4.2.1.Final)

Updates `io.netty:netty-common` from 4.1.115.Final to 4.2.1.Final
- [Commits](netty/netty@netty-4.1.115.Final...netty-4.2.1.Final)

Updates `io.netty:netty-buffer` from 4.1.115.Final to 4.2.1.Final
- [Commits](netty/netty@netty-4.1.115.Final...netty-4.2.1.Final)

Updates `io.netty:netty-codec` from 4.1.115.Final to 4.2.1.Final
- [Commits](netty/netty@netty-4.1.115.Final...netty-4.2.1.Final)

Updates `io.netty:netty-all` from 4.1.115.Final to 4.2.1.Final
- [Commits](netty/netty@netty-4.1.115.Final...netty-4.2.1.Final)

Updates `io.netty:netty-transport` from 4.1.115.Final to 4.2.1.Final
- [Commits](netty/netty@netty-4.1.115.Final...netty-4.2.1.Final)

Updates `io.netty:netty-resolver` from 4.1.115.Final to 4.2.1.Final
- [Commits](netty/netty@netty-4.1.115.Final...netty-4.2.1.Final)

---
updated-dependencies:
- dependency-name: io.netty:netty-handler
  dependency-version: 4.2.1.Final
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: io.netty:netty-common
  dependency-version: 4.2.1.Final
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: io.netty:netty-buffer
  dependency-version: 4.2.1.Final
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: io.netty:netty-codec
  dependency-version: 4.2.1.Final
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: io.netty:netty-all
  dependency-version: 4.2.1.Final
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: io.netty:netty-transport
  dependency-version: 4.2.1.Final
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: io.netty:netty-resolver
  dependency-version: 4.2.1.Final
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

bom/build.gradle

@@ -85,7 +85,7 @@ ext {
     mockitoVersion = '4.11.0'
     plexusVersion = '4.0.2'
     postgresVersion = '42.7.4' // already there
-    nettyVersion = '4.1.115.Final'
+    nettyVersion = '4.2.1.Final'
     prometheusVersion = '1.14.2'
     quartzVersion = '2.5.0'
     // TODO: May be able to remove as moving to jakarta servlet