Update sbt-header to 5.11.0 (#227)

Co-authored-by: xuwei-k <6b656e6a69@gmail.com>

Author: scala-steward

build.sbt

@@ -7,6 +7,6 @@ licenses     := Seq(("Apache-2.0", url("https://www.apache.org/licenses/LICENSE-
 developers   := List(Developer("", "", "", url("https://scala-lang.org")))
 
 addSbtPlugin("com.github.sbt" % "sbt-osgi" % "0.10.0")
-addSbtPlugin("de.heikoseeberger" % "sbt-header" % "5.10.0")
+addSbtPlugin("com.github.sbt" % "sbt-header" % "5.11.0")
 addSbtPlugin("com.github.sbt" % "sbt-ci-release" % "1.11.2") // set version, scmInfo, publishing settings
 addSbtPlugin("ch.epfl.scala" % "sbt-version-policy" % "3.2.1")  // brings in MiMa

src/main/scala/ScalaModulePlugin.scala

@@ -1,7 +1,7 @@
 package com.lightbend.tools.scalamoduleplugin
 
 import com.github.sbt.osgi.{OsgiKeys, SbtOsgi}
-import de.heikoseeberger.sbtheader.HeaderPlugin.autoImport.{HeaderLicense, headerLicense}
+import sbtheader.HeaderPlugin.autoImport.{HeaderLicense, headerLicense}
 import sbt.Keys._
 import sbt.{Def, _}
 import sbtdynver.DynVerPlugin