chore: bump sbt-gitbucket-plugin from 1.5.0 to 1.5.1

Author: yoshinorin

project/plugins.sbt

@@ -1,5 +1,5 @@
 logLevel := Level.Warn
 
 addSbtPlugin("com.typesafe.sbt" % "sbt-twirl" % "1.3.15")
-addSbtPlugin("io.github.gitbucket" % "sbt-gitbucket-plugin" % "1.5.0")
-addSbtPlugin("com.geirsson" % "sbt-scalafmt" % "1.5.1")
+addSbtPlugin("io.github.gitbucket" % "sbt-gitbucket-plugin" % "1.5.1")
+addSbtPlugin("com.geirsson" % "sbt-scalafmt" % "1.5.1")