Remove Content-Disposition header

[prondzyn]

Is your feature request related to a problem? Please describe.
Currently (version 1.3.6) I'm getting inline;filename=f.txt set in Content-Disposition header. I think it is redundant. For me, it is a bit problematic, because when I'm trying to save the response in Postman, the header is taken into account and f.txt name is suggested.

Describe the solution you'd like
I would like not to have Content-Disposition header set in the response.

Describe alternatives you've considered
Alternatively, the Content-Disposition header could contain more meaningful name like inline;filename=$URL.json or inline;filename=$URL.yaml depending on the docs URL.

[bnasslahsen]

@prondzyn,

This is related to #633, It's handled by spring directly, and not springdoc-openapi. Same remarks as #633, before opening new issues.