Update sbt-site-asciidoctor to 1.7.0

Author: scala-steward

project/plugins.sbt

@@ -9,5 +9,5 @@ addSbtPlugin("org.lyranthe.sbt" % "partial-unification" % "1.1.2")
 addSbtPlugin("org.scalameta" % "sbt-mdoc" % "2.3.5")
 addSbtPlugin("org.scoverage" % "sbt-scoverage" % "2.3.1")
 addSbtPlugin("com.simplytyped" % "sbt-antlr4" % "0.8.3")
-addSbtPlugin("com.github.sbt" % "sbt-site-asciidoctor" % "1.5.0")
+addSbtPlugin("com.github.sbt" % "sbt-site-asciidoctor" % "1.7.0")
 addCompilerPlugin("com.olegpy" %% "better-monadic-for" % "0.3.1")