Merge pull request #679 from code0-tech/copilot/sub-pr-670-yet-again

Fix grammar typo in FlowValidationErrorType description

Author: Knerio

app/graphql/types/errors/flow_validation_error_type.rb

@@ -6,7 +6,7 @@ module Errors
     class FlowValidationErrorType < Types::BaseObject
       graphql_name 'FlowValidationError'
       # rubocop:enable GraphQL/GraphqlName
-      description 'Represents an flow validation error'
+      description 'Represents a flow validation error'
 
       field :details, Errors::ActiveModelErrorType, null: true,
                                                     description: 'Additional details about the validation error'