Draft: feat(repo): change matching regex for maintainers validation

[JBOClara]

What this PR does / why we need it:

Change repoDomainPattern used to retrieve maintainers.

Which issue this PR fixes

Fix #399

[JBOClara]

I'm a bit confused since what I wanted to change is currently not expected by current tests:

Specifically this one {"Gitlab HTTPS with username/password", "https://gitlab-ci-token:[email protected]/foo/bar", "gitlab.com", nil},

		{"GitHub SSH", "[email protected]:foo/bar", "github.com", nil},
		{"GitHub HTTPS", "https://github.com/foo/bar", "github.com", nil},
		{"GitHub HTTPS with username/password", "https://foo:[email protected]/foo/bar", "github.com", nil},
		{"Gitlab SSH", "[email protected]:foo/bar", "gitlab.com", nil},
		{"Gitlab HTTPS", "https://gitlab.com/foo/bar", "gitlab.com", nil},
		{"Gitlab HTTPS with username/password", "https://gitlab-ci-token:[email protected]/foo/bar", "gitlab.com", nil},
		{"Bitbucket SSH", "[email protected]:foo/bar", "bitbucket.com", nil},
		{"Bitbucket HTTPS", "https://bitbucket.com/foo/bar", "bitbucket.com", nil},
		{"Bitbucket HTTPS with username/password", "https://user:[email protected]/foo/bar", "bitbucket.com", nil},

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