Merge pull request #546 from scala-steward/update/9.1.x/sbt-ci-release-1.12.0

[9.1.x] sbt-ci-release 1.12.0 (was 1.11.2)

Author: mkurz

project/plugins.sbt

@@ -1,3 +1,3 @@
 addSbtPlugin("com.typesafe" % "sbt-mima-plugin" % "1.1.6")
 addSbtPlugin("org.scalariform" % "sbt-scalariform" % "1.8.3")
-addSbtPlugin("com.github.sbt" % "sbt-ci-release" % "1.11.2")
+addSbtPlugin("com.github.sbt" % "sbt-ci-release" % "1.12.0")