gitlab: how to update to latest minor version

Try to update to the latest minor version as suggested here:

apt-get update
apt-get install gitlab-ce=<YOUR-LATEST-MINOR-VERSION>-ce.0
gitlab-ctl reconfigure
gitlab-ctl restart

In your case latest minor is: 10.8.6 [as of today].

You can check the release list. Remember to check the changes between your initial and target versions.

For CentOS/RHEL reference:

To install minor version on (CentOS/RHEL). Follow below steps.

To update minor version on 11.xx to latest version of 11.11.5:

sudo yum install gitlab-ce-11.11.5-ce.0.el6.x86_64

Similarly for all other version, You can find the specific version/install command you need to use at https://packages.gitlab.com/gitlab/gitlab-ce. Search for a version string such as gitlab-ce-11. Click on the RPM or Deb package for your OS version, then you will see all version of gitlab where you can findout latest version name and install it as stated above but just replace it with your minor version name i,e. gitlab-ce-11.11.5-ce.0.el6.x86_64

Upgrading from one version to another version should be followed as per the recommendation below or official page here.

12.7.5 -> 12.10.5
11.3.4 -> 11.11.1
10.6.6 -> 10.8.3
11.3.4 -> 11.11.8
10.6.6 -> 10.8.7
9.2.3 -> 9.5.5
8.9.4 -> 8.12.3 

Always recommended that first upgrade to the latest available minor version within your major version and then upgrade it next stable version.