Update src/oas.md

Co-authored-by: Henry Andrews <andrews_henry@yahoo.com>

Author: karenetheridge

src/oas.md

@@ -2129,7 +2129,7 @@ call.
 
 | Field Pattern | Type | Description |
 | ---- | :----: | ---- |
-| <a name="responses-code"></a>[HTTP Status Code](#http-status-codes) | [Response Object](#response-object) \| [Reference Object](#reference-object) | Any [HTTP status code](#http-status-codes) can be used as the property name, but only one property per code, to describe the expected response for that HTTP status code. This field MUST be represented by a string (for example, `"200"`) for compatibility between JSON and YAML. To define a range of response codes, this field MAY contain the uppercase wildcard character `X`. For example, `2XX` represents all response codes between `200` and `299`. Only the following range definitions are allowed: `1XX`, `2XX`, `3XX`, `4XX`, and `5XX`. If a response is defined using an explicit code, the explicit code definition takes precedence over the range definition for that code. |
+| <a name="responses-code"></a>[HTTP Status Code](#http-status-codes) | [Response Object](#response-object) \| [Reference Object](#reference-object) | Any [HTTP status code](#http-status-codes) can be used as the property name, but only one property per code, to describe the expected response for that HTTP status code. This field MUST be represented by a string (for example, `"200"` enclosed in quotes in YAML) for compatibility between JSON and YAML. To define a range of response codes, this field MAY contain the uppercase wildcard character `X`. For example, `2XX` represents all response codes between `200` and `299`. Only the following range definitions are allowed: `1XX`, `2XX`, `3XX`, `4XX`, and `5XX`. If a response is defined using an explicit code, the explicit code definition takes precedence over the range definition for that code. |
 
 This object MAY be extended with [Specification Extensions](#specification-extensions).