Add style: cookie and other recent changes

Author: lornajane

draft-release-notes.md

@@ -161,10 +161,15 @@ There is also a new Media Types Registry, to provide further resources for worki
 
 - Additional parameter location `querystring`, to allow parsing the entire query string as a single field similar to the way a request body is handled, using the `content` field. Useful for complex or unconventional query data. Mutually exclusive with the `query` field.
 - Parameters can therefore be `in` the `querystring` as an alternative to the existing `header`, `cookie`, `query` and `path` values.
-- `allowReserved` field is now permitted on headers and on parameters with any value of `in`.
+- `allowReserved` field is now permitted on headers and on parameters with any value of `in`, and applies where the combination of `in` and `style` automatically percent-encode the value.
 - Remove incorrect mention of Reference Object in the header `schema` field. The JSONSchema ref would be the correct thing to use in this context.
 - The `examples` (and older `example`) field is now supported with `content`.
 
+### Specific `style` option for cookies
+
+- Additional `style` option `cookie` for content in a cookie, which uses semicolon as a separator and does not encode data values.
+  The `form` style is a close fit, but you may wish to switch to `cookie` for more correct description.
+
 #### Multipart media types
 
 Multipart media types are much better supported in OpenAPI 3.2.
@@ -336,8 +341,9 @@ Particularly if you are building OpenAPI tooling, these sections give much bette
 
 ## 3.1 Updates
 
-Version 3.1.2 has no material changes but does contain editorial fixes.
+Version 3.1.2 has no material changes but does contain editorial fixes, additional examples, and clarifications.
 
+- Clarify that `$ref` in a Schema Object is a JSONSchema `$ref` keyword.
 - Detailed explanation of percent-encoding and -decoding, updated examples and references to match, including the Style Examples table.
 - Better explanation and examples for using Encoding and Serialization, and a note not to apply percent-encoding to headers.
 - Clarify that Request Body Objects need to specify at least one media type to be meaningful.