build(deps): bumps cosign to v1.13.1

[jpower432]

Signed-off-by: Jennifer Power barnabei.jennifer@gmail.com

Description

Updates cosign to version 1.13.1

Type of change

• [X] New feature (non-breaking change which adds functionality)

How Has This Been Tested?

uor-client-go build collection test-workspace localhost:5001/test:latest
uor-client-go push localhost:5001/test:latest --sign
uor-client-go pull localhost:5001/test:latest

Checklist:

• [X] My code follows the style guidelines of this project
• [X] I have performed a self-review of my own code
• [ ] I have commented my code, particularly in hard-to-understand areas
• [X] I have made corresponding changes to the documentation
• [X] My changes generate no new warnings
• [ ] I have added tests that prove my fix is effective or that my feature works
• [X] New and existing unit tests pass locally with my changes
• [ ] Requires updates to the Getting Started Guide