Updates ghcr.io/headlamp-k8s/headlamp → ghcr.io/headlamp-plugins/headlamp
in deploy-e2e-headlamp.sh (echo output and kubectl YAML image ref).
Note: .github/workflows/e2e.yaml also references headlamp-k8s/headlamp
but workflow files are Hugh's domain per SDLC rules.
Co-Authored-By: Paperclip <noreply@paperclip.ing>