message: Update docs to clarify that `GraphQLDate` inputs are marshalled as `Date` objects
  * `GraphQLDate` inputs are not marshalled as strings
  Date docs seem to imply that input `GraphQLDate` values come through as strings, but they are in fact parsed into `Date` objects, which then assume they are UTC.
  * Update date.mdx
diff: @@ -12,5 +12,5 @@ JavaScript Date instances are coerced to an RFC 3339 compliant date string. Inva
  ## Input Coercion
  -When expected as an input type, only RFC 3339 compliant date strings are accepted. All other input values raise a query
  +When expected as an input type, only RFC 3339 compliant date strings are accepted, and are parsed into `Date` objects. All other input values raise a query
  error indicating an incorrect type.
  