Update to sbt-ci-release-1.5.12

Attempt to fix the handshake error on sbt-dynver

Author: rossabaker

sbt-plugin/project/plugins.sbt

@@ -1,4 +1,4 @@
-addSbtPlugin("com.github.sbt" % "sbt-ci-release" % "1.5.10")
+addSbtPlugin("com.github.sbt" % "sbt-ci-release" % "1.5.12")
 addSbtPlugin("org.scala-sbt" % "sbt-contraband" % "0.5.3")
 addSbtPlugin("ch.epfl.scala" % "sbt-scalafix" % "0.9.34")
 addSbtPlugin("com.eed3si9n" % "sbt-buildinfo" % "0.11.0")