GitLab URL is wrong, missing subgroups and project name

[slhck]

The changelog URLs for GitLab projects are wrong:

$ git remote -v                                               
origin  https://git.example.com/foo/bar/baz/project.git (fetch)
origin  https://git.example.com/foo/bar/baz/project.git (push)

The changelog reads:

npx auto-changelog --stdout --unreleased-only | head

### Changelog

All notable changes to this project will be documented in this file. Dates are displayed in UTC.

Generated by [`auto-changelog`](https://github.com/CookPete/auto-changelog).

#### [Unreleased](https://git.example.com/foo/bar/compare/v2.0.2...HEAD)

- fix: something [`422fda4`](https://git.example.com/foo/bar/commit/422fda46601a057d2e1a074ff8b47c1595dea39e)
- fix: something else [`e8c66de`](https://git.example.com/foo/bar/commit/e8c66de1845d5c0c1cdb570609bf7983c55daf44)

Note that the last subgroup and project are missing.

Expected:

https://git.example.com/foo/bar/baz/project/commit/422fda46601a057d2e1a074ff8b47c1595dea39e

Alternatively, what GitLab redirects to:

https://git.example.com/foo/bar/baz/project/-/commit/422fda46601a057d2e1a074ff8b47c1595dea39e

This is using v2.5.0 with a GitLab 18.5 instance.

[slhck]

Ah. The fallback handler (for non-GitLab/Bitbucket/Azure hostnames) is using remote.repo which only works for 2-segment paths. GitLab instances on custom domains do not properly work with this fallback, which is why nested groups are breaking.