"variable-list" is the correct term (not "varspec")

Author: handrews

versions/3.0.4.md

@@ -3529,7 +3529,7 @@ allowReserved | `true` | `+`
 explode | `false` | _n/a_
 explode | `true` | `*`
 
-Multiple `style: form` parameters are equivalent to a single RFC6570 "varspec" using the `?` operator:
+Multiple `style: form` parameters are equivalent to a single RFC6570 [variable list](https://www.rfc-editor.org/rfc/rfc6570#section-2.2) using the `?` operator:
 
 ```YAML
 - name: foo