Oh oops, this is the first script on the page with the `defer`
attribute, which means it needs to run before other scripts with
`defer`—and in this moment, it's not loading for me, which means the
pages aren't working!
I assume Plausible told me to use `defer` rather than `async` because
it expects the page to be ready; okay! Let's just move this to the
very body of the `<head>` instead, so it isn't taking priority over
anything else.