custom-defined Headers (string) with a non-string format (i.e. int32) create show errors in the example

[timonback]

Describe the bug
custom-defined Headers (string) with a non-string format (i.e. int32) create show errors in the example

Dependencies and versions used

• springwolf-core version 1.19.0

Code example

@AsyncOperation.Headers.Header(
  name = "header-field",
  description = "header with int format",
  format = "int32")

Stack trace and error logs
The example value for this field is

unknown string schema format: int32