Version tags for mongo-tools repo

Hi, I just noticed that mongo-tools Go repo has a Go Module file but the tags are labeled with an “r” instead of a “v”. Go Modules needs the “v” to recognize the version (https://golang.org/ref/mod#versions), or else you’ll get the pseudo-versions that are showing up here now: https://pkg.go.dev/github.com/mongodb/mongo-tools?tab=versions