Update sbt-pgp to 2.1.1

Author: scala-steward

project/plugins.sbt

@@ -1,6 +1,6 @@
 addSbtPlugin("org.portable-scala" % "sbt-scalajs-crossproject" % "1.0.0")
 addSbtPlugin("org.scala-js"       % "sbt-scalajs"              % "1.3.1")
-addSbtPlugin("com.jsuereth"       % "sbt-pgp"                  % "2.0.2")
+addSbtPlugin("com.jsuereth"       % "sbt-pgp"                  % "2.1.1")
 addSbtPlugin("com.typesafe.sbt"   % "sbt-git"                  % "1.0.0")
 addSbtPlugin("org.xerial.sbt"     % "sbt-sonatype"             % "3.9.5")
 addSbtPlugin("ch.epfl.lamp"       % "sbt-dotty"                % "0.4.6")