Merge pull request #1306 from scala-steward/update/sbt-ci-release-1.9.0

Update sbt-ci-release to 1.9.0

Author: mergify[bot]

project/plugins.sbt

@@ -2,7 +2,7 @@ ThisBuild / evictionErrorLevel := Level.Info
 
 addSbtPlugin("com.eed3si9n" % "sbt-buildinfo" % "0.12.0")
 
-addSbtPlugin("com.github.sbt" % "sbt-ci-release" % "1.8.0")
+addSbtPlugin("com.github.sbt" % "sbt-ci-release" % "1.9.0")
 
 addSbtPlugin("org.scalameta" % "sbt-scalafmt" % "2.5.2")