Intermittent test failures in ci-go

[bbasata]

TestTest_TestCase_ExternalProvidersAndProviderFactories_NonHashiCorpNamespace (example)

Get
        "https://github.com/bflad/terraform-provider-scaffoldingtest/releases/download/v0.1.0/terraform-provider-scaffoldingtest_0.1.0_SHA256SUMS":
        net/http: request canceled (Client.Timeout exceeded while awaiting headers)