Update sbt-typelevel, sbt-typelevel-site to 0.7.7

Author: scala-steward

project/plugins.sbt

@@ -1,5 +1,5 @@
-addSbtPlugin("org.typelevel" % "sbt-typelevel" % "0.7.4")
-addSbtPlugin("org.typelevel" % "sbt-typelevel-site" % "0.7.4")
+addSbtPlugin("org.typelevel" % "sbt-typelevel" % "0.7.7")
+addSbtPlugin("org.typelevel" % "sbt-typelevel-site" % "0.7.7")
 
 addSbtPlugin("pl.project13.scala" % "sbt-jmh" % "0.4.7")