Update sbt-ci-release to 1.5.9 (#2244)

Author: scala-steward

project/plugins.sbt

@@ -1,7 +1,7 @@
 addSbtPlugin("com.codecommit" % "sbt-github-actions" % "0.13.0")
 addSbtPlugin("com.eed3si9n" % "sbt-assembly" % "1.1.0")
 addSbtPlugin("com.eed3si9n" % "sbt-buildinfo" % "0.10.0")
-addSbtPlugin("com.geirsson" % "sbt-ci-release" % "1.5.7")
+addSbtPlugin("com.github.sbt" % "sbt-ci-release" % "1.5.9")
 addSbtPlugin("org.scalameta" % "sbt-scalafmt" % "2.4.3")
 addSbtPlugin("com.github.cb372" % "sbt-explicit-dependencies" % "0.2.16")
 addSbtPlugin("com.github.tkawachi" % "sbt-doctest" % "0.9.9")