Update sbt-protoc to 1.0.8

Author: scala-steward-bot

project/plugins.sbt

@@ -18,7 +18,7 @@ addSbtPlugin("com.github.sbt" % "sbt-pgp" % "2.3.1")
 
 addSbtPlugin("org.scalameta" % "sbt-scalafmt" % "2.5.4")
 
-addSbtPlugin("com.thesamet" % "sbt-protoc" % "1.0.7")
+addSbtPlugin("com.thesamet" % "sbt-protoc" % "1.0.8")
 
 libraryDependencies += "com.thesamet.scalapb" %% "compilerplugin" % "0.11.17"