Fix grammar.

Co-authored-by: Mike Kistler <[email protected]>

Author: handrews

src/oas.md

@@ -1626,7 +1626,7 @@ This object MAY be extended with [Specification Extensions](#specification-exten
 
 To use the `encoding` field, a `schema` MUST exist, and the `encoding` field's  keys MUST exist in the schema as properties.
 Array properties MUST be handled by applying the given Encoding Object to multiple parts (or query parameters) with the same `name`, as is recommended by [RFC7578](https://www.rfc-editor.org/rfc/rfc7578.html#section-4.3) for supplying multiple values per form field.
-For all other property types, including array values within a top-level array, the Encoding Object MUST be applied to the entire values.
+For all other property types, including array values within a top-level array, the Encoding Object MUST be applied to the entire value.
 
 The behavior of the `encoding` field is only defined for media types structured as name-value pairs that allow repeat values.
 The order of these name-value pairs in the target media type is implementation-defined.