Update sbt-mima-plugin to 1.1.1 (#2736)

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

Author: scala-steward

project/plugins.sbt

@@ -22,7 +22,7 @@ addSbtPlugin("org.scalameta" % "sbt-mdoc" % "2.3.2")
 
 addSbtPlugin("com.eed3si9n" % "sbt-sriracha" % "0.1.0")
 
-addSbtPlugin("com.typesafe" % "sbt-mima-plugin" % "1.1.0")
+addSbtPlugin("com.typesafe" % "sbt-mima-plugin" % "1.1.1")
 
 addSbtPlugin("com.github.sbt" % "sbt-ci-release" % "1.5.10")