use current ofe sphinx theme

[atravitz]

Now that this bug is fixed, we can use the main branch of ofe_sphinx_theme

Developers certificate of origin

• I certify that this contribution is covered by the MIT License here and the Developer Certificate of Origin at https://developercertificate.org/.

[IAlibay]

@atravitz do you think it's worth cutting a release of the sphinx theme if it works as-is? I guess it doesn't matter too much but I'm wondering if it'll reduce the chance of us messing up something on main.

[atravitz]

@IAlibay I agree - just made a sphinx theme release and pinned to it here.