added missing semi-important term

Author: fehguy

versions/3.0.md

@@ -1867,7 +1867,7 @@ The `Link Object` is responsible for defining a possible operation based on a si
 
 Field Name  |  Type  | Description
 ---|:---:|---
-operationRef | `string` | a relative or reference to an OAS operation. This field is mutually exclusive with the `operationId` field, and must point to the fragment of a valid OAS definition
+operationRef | `string` | a relative or absolute reference to an OAS operation. This field is mutually exclusive with the `operationId` field, and must point to the fragment of a valid OAS definition
 operationId | `string` | the name of an _existing_, resolvable OAS operation, as defined with a unique `operationId`.  This field is mutually exclusive with the `href` field.  Relative `href` values MAY be used to locate an existing [Operation Object](#operationObject) in the OAS.
 parameters  | [Link Parameters Object](#linkParametersObject) | an object representing parameters to pass to an operation as specified with `operationId` or identified via `href`.
 headers     | [Headers Object](#headersObject)    | an object representing headers to pass to the linked resource. Where conflicts occur between these headers, and those defined in the related operation, these headers override.