Update sbt-ci-release to 1.5.11 (#45)

Co-authored-by: John <[email protected]>

Author: scala-steward

project/plugins.sbt

@@ -1,3 +1,3 @@
 addSbtPlugin("io.gatling"     % "gatling-sbt"    % "4.2.6")
-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"   % "2.5.0")