Add "editorial changes" to CONTRIBUTING.md

[martinbonnin]

Trying to document the way we operate. I don't think we have anything like this already?

See also #1136 (comment)

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[benjie]

There is the second paragraph in the document:

Contributions that do not change the interpretation of the spec but instead
improve legibility, fix editorial errors, clear up ambiguity and improve
examples are encouraged and are often merged by a spec editor with little
process.

[martinbonnin]

There is the second paragraph in the document:

Woops! Thanks!

[martinbonnin]

Actually, the way I did it was to grep for "editorial changes" in both graphql-wg and graphql-spec. I think there is some value in using the term as it's relatively used in the working groups?

Another thing that could be interesting to add in is the definition of an "editor". Is it someone with write access to the repository? Something else? How is that different from the TSC? Do we have that somewhere?

[benjie]

Let's link to the label too 👍