Docs should speak to the differences between html`` TTLs in other frameworks

Enhance is not the first framework to construct DOM from an `html` tagged template literal. For example LitHTML also uses a TTL, and so some users may be familiar with using it. The difference between LitHTML and enhance is that [LitHTML requires all the strings that you concat to be `html`.](https://lit.dev/docs/v1/lit-html/writing-templates/#nest-and-compose-templates) Enhance only requires the return value of the function to be tagged. It could eliminate some confusion if this were called out explicitly.