This tool generates the provider schema using tfgen, then calls the docs generator tool in pulumi/pulumi to use the schema to generate docs.
Run make resource_docs.
This tool indirectly depends on the pulumi/pulumi repo, namely the pkg/codegen/docs generator and the templates it uses, which is the underlying tool responsible for generating docs from the Pulumi schema.
To make changes to the templates or to use the latest ones from master, make sure you have pulumi/pulumi cloned at the right commit hash, or have made changes to the templates in that repo locally.
Any updates to the templates must also be submitted as a PR to the
pulumi/pulumirepo as well for the time being.