Update sbt-ci-release to 1.5.11 (#2811)

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

Author: scala-steward

project/plugins.sbt

@@ -24,7 +24,7 @@ addSbtPlugin("com.eed3si9n" % "sbt-sriracha" % "0.1.0")
 
 addSbtPlugin("com.typesafe" % "sbt-mima-plugin" % "1.1.1")
 
-addSbtPlugin("com.github.sbt" % "sbt-ci-release" % "1.5.10")
+addSbtPlugin("com.github.sbt" % "sbt-ci-release" % "1.5.11")
 
 addSbtPlugin("org.scalameta" % "sbt-scalafmt" % "2.4.6")