Update GitLab signing key

At the beginning of April, GitLab updated their repository signing key. If you try to update, you will see an error during sudo apt update : W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: https://packages.gitlab.com/gitlab/gitlab-ee/ubuntu bionic InRelease: The following signatures… Read more about Update GitLab signing key