[main] [2.2.x] Pin netty and ssl-config (backport #1143) by @mkurz

[mergify]

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This is an automatic backport of pull request #1143 done by [Mergify](https://mergify.com).

[mergify]

Cherry-pick of 4c7e2b0 has failed:

On branch mergify/bp/main/pr-1143
Your branch is up to date with 'origin/main'.

You are currently cherry-picking commit 4c7e2b0.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   .github/scala-steward.conf

no changes added to commit (use "git add" and/or "git commit -a")

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

[mkurz]

ah, not pinning on the main branch..