refactor: don't generate a type attribute for <script> elements, update associated docs

[therealparmesh]

From the MDN docs about the script element:

Attribute is not set (default), an empty string, or a JavaScript MIME type

Indicates that the script is a "classic script", containing JavaScript code. Authors are encouraged to omit the attribute if the script refers to JavaScript code rather than specify a MIME type. JavaScript MIME types are listed in the IANA media types specification.

I think it'd be good to reflect the best practices for <script> tag usage in templ docs.

Thank you for this library, and keep up the great work!

[a-h]

Great, thanks a lot.