Update sbt-pgp to 2.2.0

Author: scala-steward

project/plugins.sbt

@@ -1,6 +1,6 @@
 logLevel := Level.Warn
 
 addSbtPlugin("com.timushev.sbt" % "sbt-updates"  % "0.5.3")
-addSbtPlugin("com.github.sbt"   % "sbt-pgp"      % "2.1.2")
+addSbtPlugin("com.github.sbt"   % "sbt-pgp"      % "2.2.0")
 addSbtPlugin("org.xerial.sbt"   % "sbt-sonatype" % "3.9.7")
 addSbtPlugin("com.github.sbt"   % "sbt-release"  % "1.0.15")