Upgrade scala-collection-compat from 2.8.1 to 2.9.0

[scala-steward-for-moia]

Updates org.scala-lang.modules:scala-collection-compat from 2.8.1 to 2.9.0.
GitHub Release Notes - Version Diff

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.scala-lang.modules", artifactId = "scala-collection-compat" } ]

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

dependencyOverrides = [{
  pullRequests = { frequency = "@monthly" },
  dependency = { groupId = "org.scala-lang.modules", artifactId = "scala-collection-compat" }
}]

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