Upgrade to GraphQL Java 25.0-beta-9

[bclozel]

See:

• https://github.com/graphql-java/graphql-java/releases/tag/25.0.beta-6
• https://github.com/graphql-java/graphql-java/releases/tag/v25.0.beta-7
• https://github.com/graphql-java/graphql-java/releases/tag/v25.0.beta-8
• https://github.com/graphql-java/graphql-java/releases/tag/v25.0.beta-9