Merge pull request docker-library#9136 from sampaiodiego/master

Update rocket.chat to 3.8.1

Author: yosifkit

library/rocket.chat

@@ -3,8 +3,8 @@
 Maintainers: Rocket.Chat Image Team <buildmaster@rocket.chat> (@RocketChat)
 GitRepo: https://github.com/RocketChat/Docker.Official.Image.git
 
-Tags: 3.7.2, 3.7, 3, latest
-GitCommit: a96ceb8a394489ec06aba35b62cfb6d4c5936d61
+Tags: 3.8.1, 3.8, 3, latest
+GitCommit: af6d470907ecde3fe599d2b4dc4ad996cc6f34be
 Directory: 3
 
 Tags: 2.4.12, 2.4, 2