Update sbt-pgp to 2.2.1

Author: foundweekends-bot[bot]

project/plugins.sbt

@@ -1,7 +1,7 @@
 addSbtPlugin("org.scalameta" % "sbt-scalafmt" % "2.5.0")
 addSbtPlugin("com.eed3si9n" % "sbt-buildinfo" % "0.11.0")
 addSbtPlugin("org.foundweekends.conscript" % "sbt-conscript" % "0.5.8")
-addSbtPlugin("com.github.sbt" % "sbt-pgp" % "2.2.0")
+addSbtPlugin("com.github.sbt" % "sbt-pgp" % "2.2.1")
 libraryDependencies += "org.scala-sbt" %% "scripted-plugin" % sbtVersion.value
 addSbtPlugin("com.typesafe.sbt" % "sbt-site" % "1.4.1")
 addSbtPlugin("com.typesafe.sbt" % "sbt-ghpages" % "0.6.3")