openapi 3 responses text/html schema code example

Example: swagger error response

cache-control: no-cache, no-store, max-age=0, must-revalidate 
 connection: keep-alive 
 content-type: application/json 
 date: Sun, 03 Jan 2021 17:34:12 GMT 
 expires: 0 
 keep-alive: timeout=20 
 pragma: no-cache 
 transfer-encoding: chunked 
 x-content-type-options: nosniff 
 x-frame-options: DENY 
 x-xss-protection: 1; mode=block