Update gitbucket to 4.42.0

Author: scala-steward-bot

build.sbt

@@ -2,7 +2,7 @@ organization := "io.github.gitbucket"
 name := "gitbucket-emoji-plugin"
 version := "4.6.0"
 scalaVersion := "2.13.15"
-gitbucketVersion := "4.41.0"
+gitbucketVersion := "4.42.0"
 
 val donwloadImagesKey = TaskKey[Unit]("downloadImages")