Update Rails docker-library latest image

library/rails

@@ -3,6 +3,6 @@
 4.2.6: git://github.com/docker-library/rails@09ca1187b57df26d1ba3fb04874806bdd47109f8
 4.2: git://github.com/docker-library/rails@09ca1187b57df26d1ba3fb04874806bdd47109f8
 4: git://github.com/docker-library/rails@09ca1187b57df26d1ba3fb04874806bdd47109f8
-latest: git://github.com/docker-library/rails@09ca1187b57df26d1ba3fb04874806bdd47109f8
+latest: git://github.com/docker-library/rails@e9f8feb3addfd9b33f66384030191faf057a8721
 
 onbuild: git://github.com/docker-library/rails@9fb5d2b7e0f2e7029855028e07e86ab7ec54abaa onbuild