Update 3.1.1.md

Author: ralfhandl

versions/3.1.1.md

@@ -4144,7 +4144,7 @@ Certain properties allow the use of Markdown which can contain HTML including sc
 Serializing typed data to plain text, which can occur in `text/plain` message bodies or `multipart` parts, as well as in the `application/x-www-form-urlencoded` format in either URL query strings or message bodies, involves significant implementation- or application-defined behavior.
 
 [Schema Objects](#schema-object) validate data based on the [JSON Schema data model](https://datatracker.ietf.org/doc/html/draft-bhutton-json-schema-00#section-4.2.1), which only recognizes four primitive data types: strings (which are [only broadly interoperable as UTF-8](https://datatracker.ietf.org/doc/html/rfc7159#section-8.1)), numbers, booleans, and `null`.
-Notably, integers are not a distinct type from other numbers, with `type: integer` being a convenience defined mathematically, rather than based on the presence or absence of a decimal point in any string representation.
+Notably, integers are not a distinct type from other numbers, with `type: "integer"` being a convenience defined mathematically, rather than based on the presence or absence of a decimal point in any string representation.
 
 The [Parameter Object](#parameter-object), [Header Object](#header-object), and [Encoding Object](#encoding-object) offer features to control how to arrange values from array or object types.
 They can also be used to control how strings are further encoded to avoid reserved or illegal characters.