Update sbt-ci-release to 1.11.0 (#233)

Author: scala-steward

project/plugins.sbt

@@ -6,5 +6,5 @@ addSbtPlugin("com.github.sbt" % "sbt-release" % "1.4.0")
 
 addSbtPlugin("com.github.sbt" % "sbt-ghpages" % "0.7.0")
 
-addSbtPlugin("com.github.sbt" % "sbt-ci-release" % "1.9.3")
+addSbtPlugin("com.github.sbt" % "sbt-ci-release" % "1.11.0")
 addSbtPlugin("org.scalameta"  % "sbt-scalafmt"   % "2.5.4")