Add explanation about argument name uniqueness.

At a glance

• Identifier: #891
• Stage: RFC 3 / Accepted
• Champion: @dugenkui03
• Latest activity: Added to WG agenda on 2023-02-02
• Spec PR: https://github.com/graphql/graphql-spec/pull/891

Spec PR description

Details in #739.

Timeline

• Added to WG agenda on 2023-02-02
• Mentioned in WG notes on 2023-02-01
• Commit pushed on 2023-01-20 by benjie: Merge branch 'main' into moreDetailAboutArgumentNameUniquess
• Spec PR created on 2021-10-07 by dugenkui03
• Commit pushed on 2021-10-07 by dugenkui03: add explanation about argument name uniqueness.
• Added to WG agenda on 2021-10-07
• Mentioned in WG notes on 2021-10-07