go.opencensus.io tls failed to verify certificate (expired dependency certificate)

[cfi2017]

What steps did you take and what happened:

go mod download

What did you expect to happen:
go mod download

The following information will help us better understand what's going on:
Looks like velero still has some transient dependencies for packages at go.opencensus.io -> Their TLS certificate expired two days ago. As far as I can tell, there is no remediation to accept an expired TLS certificate in golang.

Note for reproducing:
If you have the dependencies in your local cache go will not attempt to fetch them again. You can move / delete your cache or set the corresponding environment variable to use a different location.

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[cfi2017]

Related: googleapis/google-cloud-go#11481

Setting GOPROXY='https://proxy.golang.org,direct' works for the time being.

[kaovilai]

Setting GOPROXY='https://proxy.golang.org,direct' works for the time being.

This is not making any changes to velero code. So how exacty is this a velero issue?