Fix missing word

Co-authored-by: Ralf Handl <[email protected]>

Author: handrews

src/oas.md

@@ -2113,7 +2113,7 @@ The various fields and types of examples are explained in more detail under [Wor
 | <a name="example-description"></a>description | `string` | Long description for the example. [CommonMark syntax](https://spec.commonmark.org/) MAY be used for rich text representation. |
 | <a name="example-data-value"></a>dataValue | Any | An example of the data structure that MUST be valid according to the relevant [Schema Object](#schema-object).  If this field is present, `value` MUST be absent. |
 | <a name="example-serialized-value"></a>serializedValue | `string` | An example of the serialized form of the value, including encoding and escaping as described under [Validating Examples](#validating-examples).  If `dataValue` is present, then this field SHOULD contain the serialization of the given data.  Otherwise, it SHOULD be the valid serialization of a data value that itself MUST be valid as described for `dataValue`.  This field SHOULD NOT be used if the serialization format is JSON, as the data form is easier to work with. If this field is present, `value`, and `externalValue` MUST be absent. |
-| <a name="example-external-value"></a>externalValue | `string` | A URI that identifies the serialized example in a separate document, allowing for values not easily or readably expressed as a Unicode string.  If `dataValue` is present, then this field SHOULD identify a serialization of the given data.  Otherwise, the value SHOULD the valid serialization of a data value that itself MUST be valid as described for `dataValue`. If this field is present, `serializedValue`, and `value` MUST be absent. See also the rules for resolving [Relative References](#relative-references-in-api-description-uris). |
+| <a name="example-external-value"></a>externalValue | `string` | A URI that identifies the serialized example in a separate document, allowing for values not easily or readably expressed as a Unicode string.  If `dataValue` is present, then this field SHOULD identify a serialization of the given data.  Otherwise, the value SHOULD be the valid serialization of a data value that itself MUST be valid as described for `dataValue`. If this field is present, `serializedValue`, and `value` MUST be absent. See also the rules for resolving [Relative References](#relative-references-in-api-description-uris). |
 | <a name="example-value"></a>value | Any | Embedded literal example. The `value` field and `externalValue` field are mutually exclusive. To represent examples of media types that cannot naturally be represented in JSON or YAML, use a string value to contain the example, escaping where necessary.<br /><br>**Deprecated for non-JSON serialization targets:** Use `dataValue` and/or `serializedValue`, which both have unambiguous syntax and semantics, instead. |
 
 This object MAY be extended with [Specification Extensions](#specification-extensions).