Cosign tlog hotfix

Description

Risk

Medium -- any changes to our attestations can cause issues with other IB apps (e.g. IBFE)

Rollback Plan

Revert MR

Testing

• https://code-ib-zelda.staging.dso.mil/dsop/Kenn/ubi8/-/pipelines/4659
• https://code-ib-zelda.staging.dso.mil/dsop/Kenn/static/-/pipelines/4660
• https://code-ib-zelda.staging.dso.mil/dsop/Kenn/helm-controller/-/pipelines/4661
• https://code-ib-zelda.staging.dso.mil/dsop/Kenn/bci-base/-/pipelines/4662

Tested downloading all of the predicates from the staging registry