Can't technically "Complete" the tutorial

[billfienberg]

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This definitely isn't high priority, but I'm currently unable to technically "complete" the graphql-ruby tutorial. I suspect it's because all of the other tutorials have a multiple choice question at the end of each step, and I suspect those questions are used to track "progress." It seems like the graphql-ruby tutorial doesn't have any of those multiple choice questions at the end of each step.