Update dependencies and regenerate client

[TimonOmsk]

Description

Dependency update to mitigate security vuln in markdown library.
Code generator updated to the latest v1 version.

The dependency updated by "replace" should be removed once it will be updated in the parent library - oapi-codegen/runtime#12

Type of change

• Bug fix (non-breaking change which fixes an issue)

Checklist (check all applicable):

• My code follows the style guidelines of this project
• I have performed a self-review of my own 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