Spec validation issues

[cliffano]

OAG 7.4.0 raises spec validation error below, which requires the addition of --skip-validate-spec on generate calls in Swaggy C 4.3.0 .

Exception in thread "main" org.openapitools.codegen.SpecValidationException: There were issues with the specification. The option can be disabled via validateSpec (Maven/Gradle) or --skip-validate-spec (CLI).
 | Error count: 3, Warning count: 4
Errors:
	-attribute components.schemas.CreateFineTuneRequest.default is not of type `array`
	-attribute components.schemas.CreateCompletionRequest.default is not of type `object`
	-attribute components.schemas.CreateChatCompletionRequest.default is not of type `object`
Warnings:
	-attribute components.schemas.CreateFineTuneRequest.default is not of type `array`
	-attribute components.schemas.CreateCompletionRequest.default is not of type `object`
	-attribute components.schemas.CreateChatCompletionRequest.default is not of type `object`

	at org.openapitools.codegen.config.CodegenConfigurator.toContext(CodegenConfigurator.java:717)
	at org.openapitools.codegen.config.CodegenConfigurator.toClientOptInput(CodegenConfigurator.java:744)
	at org.openapitools.codegen.cmd.Generate.execute(Generate.java:527)
	at org.openapitools.codegen.cmd.OpenApiGeneratorCommand.run(OpenApiGeneratorCommand.java:32)
	at org.openapitools.codegen.OpenAPIGenerator.main(OpenAPIGenerator.java:66)

However, there is a possibility of misleading message as per OpenAPITools/openapi-generator#1324