scss exects semicolon (#36779)

copy/pasting the SCSS example into VSCode results in linter warning. Fixed with semicolon on variable assignment. Added the second semicolon for consistency.



## Documentation / Examples

- [ ] Make sure the linting passes by running `yarn lint`


Co-authored-by: JJ Kasper <22380829+ijjk@users.noreply.github.com>

docs/basic-features/built-in-css-support.md

@@ -189,10 +189,10 @@ For example, using the exported `primaryColor` Sass variable:
 
 ```scss
 /* variables.module.scss */
-$primary-color: #64FF00
+$primary-color: #64ff00;
 
 :export {
-  primaryColor: $primary-color
+  primaryColor: $primary-color;
 }
 ```