Update handbook for dependencies.io to reflect usage of version 3
https://about.gitlab.com/handbook/engineering/development/enablement/distribution/maintenance/dependencies.io.html is slightly out of date now that we are on v 3.
/cc @twk3
https://about.gitlab.com/handbook/engineering/development/enablement/distribution/maintenance/dependencies.io.html is slightly out of date now that we are on v 3.
/cc @twk3