Do not exclude schema keyword if schema has description

At a glance

• Identifier: #1167
• Stage: RFC0: Strawman
• Champion: @benjie
• PR: Do not exclude schema keyword if schema has description

Timeline

• Added to 2025-06-05 WG agenda
• Spec PR created on 2025-05-19 by benjie
• Commit pushed: Do not exclude schema keyword if schema has description on 2025-05-19 by @benjie

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This is a bugfix; previously we said that the schema keyword can/should be omitted if the root operation type names line up, but we neglected to think about the schema description. This fixes that.

Trivial fix @graphql/tsc

(Discussed as part of #1166, but since there's pushback to the naked schema keyword I'm separating this out into its own standalone fix.)