SEO advice is off-topic on Stack Overflow. But your question can still be answered here, because …
In HTML5, the nofollow link type may only be used with a
and area
elements.
So don’t use it on link
elements.
For script elements, there is no rel
attribute in the first place.
(Note: Your script
element has the type
value text/css
. It’s likely that this is not what you want. If it’s JavaScript, use text/javascript
(or omit the type attribute).)