Merge pull request #363 from scala-steward/update/sbt-sonatype-3.12.2

Update sbt-sonatype to 3.12.2

Author: dimafeng

project/Plugins.sbt

@@ -1,4 +1,4 @@
-addSbtPlugin("org.xerial.sbt" % "sbt-sonatype" % "2.3")
+addSbtPlugin("org.xerial.sbt" % "sbt-sonatype" % "3.12.2")
 addSbtPlugin("com.github.sbt" % "sbt-pgp" % "2.3.0")
 addSbtPlugin("com.github.sbt" % "sbt-release" % "1.1.0")
 addSbtPlugin("org.scalastyle" %% "scalastyle-sbt-plugin" % "1.0.0")