chore(deps): Bump io.netty:netty-bom from 4.1.124.Final to 4.2.6.Final

[dependabot]

Bumps io.netty:netty-bom from 4.1.124.Final to 4.2.6.Final.

Commits

• 255ad95 [maven-release-plugin] prepare release netty-4.2.6.Final
• bbacc6b BouncyCastleAlpnSslUtils needs to use the correct SSLEngine class as … (#15630)
• d28a0fc Make ResourceLeakDetector.track not final (#15620)
• 7134f60 [refactor] add error message to all new Error() calls (#15609)
• f7f5b48 Add test for OpenJdkSelfSignedCertGenerator (#15619)
• 9e4bb29 IoUring: Allow to create IoHandlerFactory that supports changing the (#15608)
• 22d414b Skip huge decompression test with leak detection (#15616)
• 77661e7 Update the CentOS devcontainer (#15615)
• ea90268 Don't try to generate aggregated javadocs for the stubs as otherwise it will ...
• b54f47e [maven-release-plugin] prepare for next development iteration
• Additional commits viewable in compare view

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[oscerd]

We cannot upgrade to 4.2.x yet

[dependabot]

OK, I won't notify you again about this release, but will get in touch when a new version is available. If you'd rather skip all updates until the next major or minor version, let me know by commenting @dependabot ignore this major version or @dependabot ignore this minor version. You can also ignore all major, minor, or patch releases for a dependency by adding an ignore condition with the desired update_types to your config file.

If you change your mind, just re-open this PR and I'll resolve any conflicts on it.