Add permissions block

To grant the workflow the permission to generate an OIDC token.

Author: ioannis-vm

.github/workflows/deploy.yaml

@@ -7,6 +7,10 @@ on:
     types:
       - completed
 
+permissions:
+  contents: read
+  id-token: write
+
 jobs:
   deploy:
     if: ${{ github.event.workflow_run.conclusion == 'success' }}