Bug on FlexContent on WPgraphql ACF

Description

There is a bug on flexContent while using it in wordpress 6.7.1 php 8.2 and WPGraphQL and WPGraphQL ACF new version.

Steps to reproduce

query GetPage($databaseId: ID!, $asPreview: Boolean = true) {
page(id: $databaseId, idType: DATABASE_ID, asPreview: $asPreview) {
title
pageBuilder {
footerDonateCta
footerDonateType
newsletterCallToAction
pageContent {
fieldGroupName
... on pbPageContentDynamicLayout {
flexContent {
fieldGroupName
}
}
}
}
}
}

Additional context

No response

WPGraphQL Version

2.1.1

WordPress Version

6.7.1

PHP Version

8.2

Additional environment details

No response

Please confirm that you have searched existing issues in the repo.

• Yes

Please confirm that you have disabled ALL plugins except for WPGraphQL.

• Yes
• My issue is with compatibility with a specific WordPress plugin, and I have listed all my installed plugins (and version info) above.

Start by reproducing the reported query against WordPress 6.7.1, PHP 8.2, WPGraphQL 2.1.1, and the current WPGraphQL ACF version, focusing on the pageBuilder.pageContent.flexContent selection. Inspect the flexContent GraphQL entry point and confirm the fix by showing that this query returns the expected fieldGroupName without regression.