Add a default remote mapping - *.githubprivate.com to "type": "GitHub"

[bendtherules]

*.githubprivate.com is often used for private instances of github. So, it might make sense to add a default config similar to - "gitlens.remotes": [{ "domain": "*.githubprivate.com", "type": "GitHub" }] (with corrected regex).

@eamodio Thoughts?