Update sbt-release to 1.4.0 (#79)

Author: scala-steward

project/plugins.sbt

@@ -2,5 +2,5 @@ addSbtPlugin("org.xerial.sbt" % "sbt-sonatype" % "3.10.0")
 addSbtPlugin("com.github.sbt" % "sbt-pgp"      % "2.1.2")
 addSbtPlugin("org.scalameta"  % "sbt-scalafmt" % "2.5.2")
 addSbtPlugin("org.scalameta"  % "sbt-mdoc"     % "2.5.2")
-addSbtPlugin("com.github.sbt" % "sbt-release"  % "1.3.0")
+addSbtPlugin("com.github.sbt" % "sbt-release"  % "1.4.0")
 addSbtPlugin("com.github.sbt" % "sbt-git"      % "2.0.1")