Allow changes to go.sum *and* go.mod when running dependabot tidy-up (#871)
Allow changes to go.sum *and* go.mod when running dependabot tidy-up (#871)

Transitive dependency changes sometimes do require a change to go.mod
files as well as go.sum. This is already live in the
opentelemetry-go-contrib repo, and this PR brings it here.
open-telemetry/opentelemetry-go,open-telemetry/opentelemetry-go