Update sbt-header to 5.11.0

Author: scala-steward

project/plugins.sbt

@@ -1,4 +1,4 @@
 addSbtPlugin("com.eed3si9n" % "sbt-assembly" % "2.3.1")
-addSbtPlugin("de.heikoseeberger" % "sbt-header" % "5.10.0")
+addSbtPlugin("com.github.sbt" % "sbt-header" % "5.11.0")
 addSbtPlugin("com.github.sbt" % "sbt-github-actions" % "0.25.0")
 addSbtPlugin("com.github.sbt" % "sbt-ci-release" % "1.9.2")