Update code signing certificate in siging workflow

[schrolla]

💡 Summary

Rotate and validate new code signing certificate works in existing code signing pipeline workflows.

Motivation and context

Certificates expire on a periodic basis. Updating as needed ensures that signed releases are still valid and verifiable by users.

Implementation notes

Assumes new certificate has already been acquired and is available for use.

Please provide details for implementation, such as:

• Get updated certificate information from AKV
• Update Github secret with certificate information
• Run build and sign release workflow

Acceptance criteria

How do we know when this work is done?

• Github secret updated with latest certificate information
• Build and sign workflow runs successfully
• Draft release from workflow verified to have valid digital signature using latest certificate