Merge pull request #141 from scala-steward/update/sbt-ci-release-1.9.3

Update sbt-ci-release to 1.9.3

Author: mkurz

project/plugin.sbt

@@ -1,3 +1,3 @@
-addSbtPlugin("com.github.sbt" % "sbt-ci-release"     % "1.9.2")
+addSbtPlugin("com.github.sbt" % "sbt-ci-release"     % "1.9.3")
 addSbtPlugin("com.github.sbt" % "sbt-github-actions" % "0.25.0")
 addSbtPlugin("org.scalameta"  % "sbt-scalafmt"       % "2.5.4")