partial undo of replace-all for contour-gateway.yaml
partial undo of replace-all for contour-gateway.yaml

Signed-off-by: Tim Ramlot <d73db8d5e1a403bd21bc63b0ca0b070949a407f7@users.noreply.github.com>

cert-manager/cert-manager,cert-manager/cert-manager,jetstack/cert-manager,cert-manager/cert-manager,jetstack/cert-manager,jetstack/cert-manager