Bump gitbucket-gist-plugin to 4.17.0

Author: takezoe

README.md

@@ -4,6 +4,7 @@ This is a GitBucket plug-in which provides code snippet repository like Gist.
 
 Plugin version | GitBucket version
 :--------------|:--------------------
+4.17.x         | 4.30.x -
 4.16.x         | 4.26.x -
 4.15.x         | 4.25.x -
 4.13.x, 4.14.x | 4.23.x -

build.sbt

@@ -1,6 +1,6 @@
 organization := "io.github.gitbucket"
 name := "gitbucket-gist-plugin"
-version := "4.16.0"
+version := "4.17.0"
 scalaVersion := "2.12.7"
 gitbucketVersion := "4.30.0-SNAPSHOT"