fix: openapi info section

[bkioshn]

Description

Fix cat-gateway openAPI info section to follow the v3.0.0 schema.
For reference, please refer to v3.0.0

Related Issue(s)

Closes #143

Description of Changes

• Remove summary and identifier

Related Pull Requests

#208

Please confirm the following checks

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream module

[Mr-Leshiy]

LGTM

[stevenj]

LGTM but
Please point the PR to main and ensure that CI is passing.

The base branch was changed.