Update mongo

Changes:

- https://github.com/docker-library/mongo/commit/c6d7e7f: Update to 3.6.13

library/mongo

@@ -18,17 +18,17 @@ GitCommit: 135be00ece480b72826d871f5725214c35a1a9ab
 Directory: 3.4/windows/windowsservercore-ltsc2016
 Constraints: windowsservercore-ltsc2016
 
-Tags: 3.6.12-xenial, 3.6-xenial, 3-xenial
-SharedTags: 3.6.12, 3.6, 3
+Tags: 3.6.13-xenial, 3.6-xenial, 3-xenial
+SharedTags: 3.6.13, 3.6, 3
 # see http://repo.mongodb.org/apt/ubuntu/dists/xenial/mongodb-org/3.6/multiverse/
 Architectures: amd64, arm64v8
-GitCommit: 40056ae591c1caca88ffbec2a426e4da07e02d57
+GitCommit: c6d7e7fb21b03905c4796293f9bdbba5227acd75
 Directory: 3.6
 
-Tags: 3.6.12-windowsservercore-ltsc2016, 3.6-windowsservercore-ltsc2016, 3-windowsservercore-ltsc2016
-SharedTags: 3.6.12-windowsservercore, 3.6-windowsservercore, 3-windowsservercore, 3.6.12, 3.6, 3
+Tags: 3.6.13-windowsservercore-ltsc2016, 3.6-windowsservercore-ltsc2016, 3-windowsservercore-ltsc2016
+SharedTags: 3.6.13-windowsservercore, 3.6-windowsservercore, 3-windowsservercore, 3.6.13, 3.6, 3
 Architectures: windows-amd64
-GitCommit: 91f6cebf99ab6e822ed37fbdd47b4a11e76a0688
+GitCommit: c6d7e7fb21b03905c4796293f9bdbba5227acd75
 Directory: 3.6/windows/windowsservercore-ltsc2016
 Constraints: windowsservercore-ltsc2016