Missing GitLab-Runner Versions from official Ubuntu 20.04 Repository

Summary

Missing Versions of GitLab-Runner superior to 11.2

Steps to reproduce

Run the installation guide from https://docs.gitlab.com/runner/install/linux-repository.html, then check via apt-cache policy gitlab-runner

Example Project

Please creat a fresh Ubuntu 20.04 Installation and afterwards note output below

What is the current bug behavior?

sudo apt-cache policy gitlab-runner
gitlab-runner:
  Installiert:           (keine)
  Installationskandidat: 11.2.0+dfsg-2ubuntu1
  Versionstabelle:
     11.2.0+dfsg-2ubuntu1 500
        500 http://de.archive.ubuntu.com/ubuntu focal/universe amd64 Packages

What is the expected correct behavior?

Something like this (Ubuntu 16.04):

gitlab-runner:
  Installiert:           12.9.0
  Installationskandidat: 13.0.0
  Versionstabelle:
     13.0.0 500
        500 https://packages.gitlab.com/runner/gitlab-runner/ubuntu xenial/main amd64 Packages
     12.10.2 500
        500 https://packages.gitlab.com/runner/gitlab-runner/ubuntu xenial/main amd64 Packages
     12.10.1 500
        500 https://packages.gitlab.com/runner/gitlab-runner/ubuntu xenial/main amd64 Packages
     12.10.0 500
        500 https://packages.gitlab.com/runner/gitlab-runner/ubuntu xenial/main amd64 Packages
 *** 12.9.0 500
        500 https://packages.gitlab.com/runner/gitlab-runner/ubuntu xenial/main amd64 Packages
        100 /var/lib/dpkg/status

Possible fixes

Include more recent Versions for focal fossal!