Update sbt-typelevel, sbt-typelevel-site to 0.8.0 (#664)

Co-authored-by: typelevel-steward[bot] <106827141+typelevel-steward[bot]@users.noreply.github.com>

Author: typelevel-steward[bot]

project/plugins.sbt

@@ -3,5 +3,5 @@ addSbtPlugin("org.scala-native" % "sbt-scala-native" % "0.5.7")
 addSbtPlugin("org.scala-js" % "sbt-scalajs" % "1.18.2")
 addSbtPlugin("org.scoverage" % "sbt-scoverage" % "2.3.1")
 addSbtPlugin("pl.project13.scala" % "sbt-jmh" % "0.4.7")
-addSbtPlugin("org.typelevel" % "sbt-typelevel" % "0.7.7")
-addSbtPlugin("org.typelevel" % "sbt-typelevel-site" % "0.7.7")
+addSbtPlugin("org.typelevel" % "sbt-typelevel" % "0.8.0")
+addSbtPlugin("org.typelevel" % "sbt-typelevel-site" % "0.8.0")