Utterances Requires inline-script CSP Access

[micchickenburger]

Describe the problem:

Commit 9ea82c5 change Utterances script load logic to support changing between light and dark modes. However, this uses an inline script. This inline script will not execute unless the site's Content Security Policy allows inline-script, which is generally not considered a good idea.

Steps to reproduce:

1. Configure utterances
2. Implement a content security policy without inline-script access

One possible workaround might be to load this as an external script, using whatever Hugo uses for generating the integrity values on script elements.

[micchickenburger]

Actually, we might be able to revert back to the original code altogether. That's what I did in my site, and take a look: Changing the theme from light to dark works just fine for utterances. https://www.micah.soy/posts/introduction-to-cryptography-blade-runner-style/