Update .gitlab-ci.yml file

prepare_job:

  stage: prepare                                              # This stage must run before the release stage

  stage: .pre                                              # This stage must run before the release stage

  rules:

    - if: $CI_COMMIT_TAG

      when: never                                             # Do not run this job when a tag is created manually

    description: 'Created using the release-cli $EXTRA_DESCRIPTION'  # $EXTRA_DESCRIPTION and the $TAG

    tag_name: '$TAG'                                                 # variables must be defined elsewhere

    ref: '$CI_COMMIT_SHA'                                            # in the pipeline. For example, in the

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    milestones:                                                      # prepare_job

      - 'm1'

      - 'm2'

      - 'm3'

    released_at: '2020-07-15T08:00:00Z'  # Optional, is auto generated if not defined, or can use a variable.

    assets:

      links:

        - name: 'asset1'

          url: 'https://example.com/assets/1'

        - name: 'asset2'

          url: 'https://example.com/assets/2'

          filepath: '/pretty/url/1' # optional

          link_type: 'other' # optional

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