Change CI config to use new base image

.gitlab-ci.yml

-image: "dev.gitlab.org:5005/gitlab/gitlab-build-images:ruby-2.3.5-golang-1.8-git-2.13-chrome-62.0-node-8.x-yarn-1.2-postgresql-9.6"
+image: "dev.gitlab.org:5005/gitlab/gitlab-build-images:ruby-2.3.5-golang-1.8-git-2.14-chrome-63.0-node-8.x-yarn-1.2-postgresql-9.6"
 
 .default-cache: &default-cache
   key: "ruby-235-with-yarn"

doc/install/installation.md

@@ -80,7 +80,7 @@ Make sure you have the right version of Git installed
     # Install Git
     sudo apt-get install -y git-core
 
-    # Make sure Git is version 2.13.6 or higher
+    # Make sure Git is version 2.14.3 or higher
     git --version
 
 Is the system packaged Git too old? Remove it and compile from source.