Fix openapi field's description of version field

Author: handrews

src/oas.md

@@ -94,7 +94,7 @@ In addition to the required fields, at least one of the `components`, `paths`, o
 
 | Field Name | Type | Description |
 | ---- | :----: | ---- |
-| <a name="oas-version"></a>openapi | `string` | **REQUIRED**. This string MUST be the [version number](#versions-and-deprecation) of the OpenAPI Specification that the OpenAPI document uses. The `openapi` field SHOULD be used by tooling to interpret the OpenAPI document. This is _not_ related to the API [`info.version`](#info-version) string. |
+| <a name="oas-version"></a>openapi | `string` | **REQUIRED**. This string MUST be the [version number](#versions-and-deprecation) of the OpenAPI Specification that the OpenAPI document uses. The `openapi` field SHOULD be used by tooling to interpret the OpenAPI document. This is _not_ related to the [`info.version`](#info-version) string, which describes the OpenAPI document's version. |
 | <a name="oas-self"></a>$self | `string` | This string MUST be in the form of a URI-reference as defined by [[RFC3986]] [Section 4.1](https://www.rfc-editor.org/rfc/rfc3986#section-4.1). The `$self` field provides the self-assigned URI of this document, which also serves as its base URI in accordance with [[RFC3986]] [Section 5.1.1](https://www.rfc-editor.org/rfc/rfc3986#section-5.1.1). Implementations MUST support identifying the targets of [API description URIs](#relative-references-in-api-description-uris) using the URI defined by this field when it is present. See [Establishing the Base URI](#establishing-the-base-uri) for the base URI behavior when `$self` is absent or relative, and see [Appendix F]((#appendix-f-examples-of-base-uri-determination-and-reference-resolution)) for examples of using `$self` to resolve references. |
 | <a name="oas-info"></a>info | [Info Object](#info-object) | **REQUIRED**. Provides metadata about the API. The metadata MAY be used by tooling as required. |
 | <a name="oas-json-schema-dialect"></a> jsonSchemaDialect | `string` | The default value for the `$schema` keyword within [Schema Objects](#schema-object) contained within this OAS document. This MUST be in the form of a URI. |