Update snakeyaml to 1.30 in series/4.x

[scala-steward]

Updates org.yaml:snakeyaml from 1.28 to 1.30.
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I'll automatically update this PR to resolve conflicts as long as you don't change it yourself.

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Adjust future updates

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

updates.ignore = [ { groupId = "org.yaml", artifactId = "snakeyaml" } ]

Or, add this to slow down future updates of this dependency:

dependencyOverrides = [{
  pullRequest = { frequency = "@monthly" },
  dependency = { groupId = "org.yaml", artifactId = "snakeyaml" }
}]

labels: library-update, commit-count:1