Automatic links for GitLab merge requests are not generated

[dbluxo]

Hi 👋

Expected Behavior

We expect a generated changelog to contain the links to the GitLab merge requests.

Actual Behavior

The generated changelog lists the merge requests, but the links are missing:

<a name="2021.09.22"></a>
## [2021.09.22] - 2021-09-22
### Merge Requests
- Merge branch 'renovate/aws-ebs-csi-driver-2.x' into 'main'
- Merge branch 'renovate/aws-ebs-csi-driver-2.x' into 'main'
- Merge branch 'renovate/aws-ebs-csi-driver-2.x' into 'main'
- Merge branch 'renovate/cluster-autoscaler-9.x' into 'main'
- Merge branch 'renovate/cluster-autoscaler-9.x' into 'main'
- Merge branch 'renovate/kubernetes-dashboard-5.x' into 'main'
- Merge branch 'renovate/kubernetes-dashboard-4.x' into 'main'

Steps to Reproduce (including precondition)

We are running git-chglog -o CHANGELOG.md in a repo which includes merge request commits, extract from a git log:

...
commit addf4f5ed8fac3e38aa59e88eb373a38c2123bb4 (tag: 2021.09.22)
Merge: 941f9bf 17bc668
Author: <redacted>
Date:   Wed Sep 22 07:16:30 2021 +0000

    Merge branch 'renovate/aws-ebs-csi-driver-2.x' into 'main'

    Update Helm release aws-ebs-csi-driver to v2.2.1

    See merge request k8s/quickstart-eks!207

commit a7bc668bdffba52366858d1d805b1950d0594bd2
Author: <redacted>
Date:   Wed Sep 22 03:15:08 2021 +0000

    Update Helm release aws-ebs-csi-driver to v2.2.1

commit a41f9bfe69cd686f409cd95808df24eaddf39a20
Merge: 8e75b7d c595646
Author: <redacted>
Date:   Fri Sep 17 06:04:27 2021 +0000

    Merge branch 'renovate/aws-ebs-csi-driver-2.x' into 'main'

    Update Helm release aws-ebs-csi-driver to v2.2.0

    See merge request k8s/quickstart-eks!206

commit a59564677dbb25fdd29fa86354c310989b4b44c6
Author: <redacted>
Date:   Fri Sep 17 03:15:04 2021 +0000

    Update Helm release aws-ebs-csi-driver to v2.2.0
...

Our config.yml

style: gitlab
template: CHANGELOG.tpl.md
info:
  title: CHANGELOG
  repository_url: https://<private-gitlab-domain>/k8s/quickstart-eks
options:
  commits:
    filters:
      Type:
        - build
        - ci
        - docs
        - feat
        - fix
        - perf
        - refactor
        - style
        - test
  commit_groups:
    title_maps:
      build: Build System
      ci: CI/CD Pipeline
      docs: Documentation
      feat: Features
      fix: Bug Fixes
      perf: Performance Improvements
      refactor: Code Refactoring
      style: Style Improvements
      test: Test Improvements
  header:
    pattern: "^(\\w*)(?:\\(([\\w\\$\\.\\-\\*\\s]*)\\))?\\:\\s(.*)$"
    pattern_maps:
      - Type
      - Scope
      - Subject
  notes:
    keywords:
      - BREAKING CHANGE

Our CHANGELOG.tpl.md:

{{ if .Versions -}}
<a name="unreleased"></a>
## [Unreleased]

{{ if .Unreleased.CommitGroups -}}
{{ range .Unreleased.CommitGroups -}}
### {{ .Title }}
{{ range .Commits -}}
- {{ if .Scope }}**{{ .Scope }}:** {{ end }}{{ .Subject }}
{{ end }}
{{ end -}}
{{ end -}}
{{ end -}}

{{ range .Versions }}
<a name="{{ .Tag.Name }}"></a>
## {{ if .Tag.Previous }}[{{ .Tag.Name }}]{{ else }}{{ .Tag.Name }}{{ end }} - {{ datetime "2006-01-02" .Tag.Date }}
{{ range .CommitGroups -}}
### {{ .Title }}
{{ range .Commits -}}
- {{ if .Scope }}**{{ .Scope }}:** {{ end }}{{ .Subject }}
{{ end }}
{{ end -}}

{{- if .RevertCommits -}}
### Reverts
{{ range .RevertCommits -}}
- {{ .Revert.Header }}
{{ end }}
{{ end -}}

{{- if .MergeCommits -}}
### Merge Requests
{{ range .MergeCommits -}}
- {{ .Header }}
{{ end }}
{{ end -}}

{{- if .NoteGroups -}}
{{ range .NoteGroups -}}
### {{ .Title }}
{{ range .Notes }}
{{ .Body }}
{{ end }}
{{ end -}}
{{ end -}}
{{ end -}}

{{- if .Versions }}
[Unreleased]: {{ .Info.RepositoryURL }}/-/compare/{{ $latest := index .Versions 0 }}{{ $latest.Tag.Name }}...main
{{ range .Versions -}}
{{ if .Tag.Previous -}}
[{{ .Tag.Name }}]: {{ $.Info.RepositoryURL }}/compare/{{ .Tag.Previous.Name }}...{{ .Tag.Name }}
{{ end -}}
{{ end -}}
{{ end -}}

Your Environment

• OS: macOS 11.6.1
• git-chglog version: 0.15.0

Related to: #160