Bump jruby to 9.2.8.0

* Bump repo reference to latest.
* s/9.2.7/9.2.8/

library/jruby

@@ -1,21 +1,21 @@
 Maintainers: Brian Goff <cpuguy83@gmail.com> (@cpuguy83)
 GitRepo: https://github.com/cpuguy83/docker-jruby.git
 GitFetch: refs/heads/master
-GitCommit: 2652374c4b77233723990e0f27993f185bf80645
+GitCommit: df880c1c46b8cfb0c5df25b69b758be4bbcd6297
 
-Tags: latest, 9, 9.2, 9.2.7, 9.2-jre, 9.2.7-jre, 9.2.7.0, 9.2.7.0-jre
+Tags: latest, 9, 9.2, 9.2.8, 9.2-jre, 9.2.8-jre, 9.2.8.0, 9.2.8.0-jre
 Architectures: amd64, i386, arm32v5, arm64v8, ppc64le, s390x
 Directory: 9000/jre
 
-Tags: 9-alpine, 9.2-alpine, 9.2.7-alpine, 9.2-jre-alpine, 9.2.7-jre-alpine, 9.2.7.0-alpine, 9.2.7.0-jre-alpine
+Tags: 9-alpine, 9.2-alpine, 9.2.8-alpine, 9.2-jre-alpine, 9.2.8-jre-alpine, 9.2.8.0-alpine, 9.2.8.0-jre-alpine
 Architectures: amd64, arm64v8, ppc64le, s390x
 Directory: 9000/alpine-jre
 
-Tags: 9-jdk, 9.2-jdk, 9.2.7-jdk, 9.2.7.0-jdk
+Tags: 9-jdk, 9.2-jdk, 9.2.8-jdk, 9.2.8.0-jdk
 Architectures: amd64, i386, arm32v5, arm64v8, ppc64le, s390x
 Directory: 9000/jdk
 
-Tags: 9-jdk-alpine, 9.2-jdk-alpine, 9.2.7-jdk-alpine, 9.2.7.0-jdk-alpine
+Tags: 9-jdk-alpine, 9.2-jdk-alpine, 9.2.8-jdk-alpine, 9.2.8.0-jdk-alpine
 Architectures: amd64, arm64v8, ppc64le, s390x
 Directory: 9000/alpine-jdk