Update updates.sts.yaml

Signed-off-by: John Osborne <johnfosborneiii@gmail.com>

.github/chainguard/updates.sts.yaml

@@ -5,7 +5,6 @@ issuer: https://token.actions.githubusercontent.com
 subject_pattern: repo:chainguard-dev/auto-deploy-demo:.*
 claim_pattern:
   job_workflow_ref: chainguard-dev/auto-deploy-demo/.github/workflows/updates.yaml@.*
-  job_workflow_ref: chainguard-dev/auto-deploy-demo/.github/workflows/scan.yaml@.*
 
 permissions:
   contents: write