Update scala-collection-compat to 2.9.0

[47erbot]

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

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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