Update sbt-ghpages to 0.8.0

Author: scala-steward

project/plugins.sbt

@@ -1,7 +1,7 @@
 addSbtPlugin("com.typesafe" % "sbt-mima-plugin" % "1.1.2")
 addSbtPlugin("com.typesafe.sbt" % "sbt-git" % "1.0.2")
 addSbtPlugin("com.typesafe.sbt" % "sbt-site" % "1.4.1")
-addSbtPlugin("com.typesafe.sbt" % "sbt-ghpages" % "0.6.3")
+addSbtPlugin("com.github.sbt" % "sbt-ghpages" % "0.8.0")
 addSbtPlugin("org.scoverage" % "sbt-scoverage" % "2.0.0")
 addSbtPlugin("org.scoverage" % "sbt-coveralls" % "1.3.8")
 addSbtPlugin("com.codecommit" % "sbt-github-actions" % "0.14.2")