Update finagle-core, finagle-netty4 to 21.12.0

[scala-steward]

Updates

• com.twitter:finagle-core
• com.twitter:finagle-netty4

from 21.4.0 to 21.12.0. Changelog

I'll automatically update this PR to resolve conflicts as long as you don't change it yourself.

If you'd like to skip this version, you can just close this PR. If you have any feedback, just mention me in the comments below.

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Ignore future updates

Add this to your .scala-steward.conf file to ignore future updates of this dependency:

updates.ignore = [ { groupId = "com.twitter" } ]

labels: library-update, early-semver-minor, semver-spec-minor, commit-count:1