Modify all instances of development URL

[wcrum]

Several files including the mkdocs.yml have linked to v2.marines.dev this is simply for correct asset mapping. Prior to relasing we need to change this an the CNAME.

[wcrum]

marines.dev/mkdocs.yml

Line 2 in c7a96b4

site_url: https://v2.marines.dev/

marines.dev/CNAME

Line 1 in c7a96b4

v2.marines.dev

marines.dev/docs/CNAME

Line 1 in c7a96b4

v2.marines.dev

I am kinda of sure the reason that CNAME exists within / and /docs is because the CNAME file wasnt moving over into the gh-pages branch unless it gets caked in after the actions, specifically after mkdocs gh-deploy --force. Might delete root CNAME but 🤷🏻.

Most people look at root CNAME anyway, could just move it during action.