README Flux install points to an missing YAML file

In the deployment steps https://repo1.dso.mil/platform-one/big-bang/customers/template#deploy

When deploying flux this command is used curl https://repo1.dso.mil/platform-one/big-bang/bigbang/-/raw/master/scripts/deploy/flux.yaml | kubectl apply -f -

However that URL is no longer valid, it results in a 404, and over in the big-bang/bigbang repo I can see no equivalent file

Are these steps out of date?