Update tailwind-css.md (#23028)

CSS-in-JS section was referring to `Styled Components`, but in reality, it was using `Emotion`. I updated the documentation to reflect that.

Co-authored-by: gatsbybot <[email protected]>

docs/docs/tailwind-css.md

@@ -66,7 +66,7 @@ To learn more about how to use Tailwind in your CSS, visit the [Tailwind Documen
 
 ### Option #2: CSS-in-JS
 
-These steps assume you have a CSS-in-JS library already installed, and the examples are based on Styled Components.
+These steps assume you have a CSS-in-JS library already installed, and the examples are based on Emotion.
 
 1. Install Tailwind Babel Macro
 
@@ -108,7 +108,7 @@ npm install tailwind.macro
 2. Use the Babel Macro (`tailwind.macro`) in your styled component
 
 ```javascript
-import styled from "styled-components"
+import styled from "@emotion/styled"
 import tw from "tailwind.macro"
 
 // All versions