Update sbt-ci-release to 1.12.1

Author: typelevel-steward[bot]

project/plugins.sbt

@@ -1,5 +1,5 @@
 addSbtPlugin("com.eed3si9n" % "sbt-buildinfo" % "0.13.1")
-addSbtPlugin("com.github.sbt" % "sbt-ci-release" % "1.11.2")
+addSbtPlugin("com.github.sbt" % "sbt-ci-release" % "1.12.1")
 addSbtPlugin("com.github.sbt" % "sbt-unidoc" % "0.6.1")
 addSbtPlugin("com.typesafe" % "sbt-mima-plugin" % "1.1.5")
 addSbtPlugin("com.github.sbt" % "sbt-header" % "5.11.0")