fix(sec): upgrade gunicorn to 20.0.1

[pen4]

What happened？

There are 1 security vulnerabilities found in gunicorn 19.6.0

• MPS-2022-14935

What did I do？

Upgrade gunicorn from 19.6.0 to 20.0.1 for vulnerability fix

What did you expect to happen？

Ideally, no insecure libs should be used.

The specification of the pull request

PR Specification from OSCS

Signed-off-by:pen4[email protected]