Typo in V4 Specification README

[curly-brace-butler]

It's a minor nitpick. But, in the V4 README, under the bodies subsection the JSON properties of body are enumerated "contentType", "encoded", contents", and "contentTypeHint".

However, from examples, "content" appears to be the proper name for the body substance. It's also not entirely clear to me from the description which of these properties, if any, are optional.

[YOU54F]

This has been updated now @curly-brace-butler, did this help clarify