chore: bump go to 1.16 in ci workflow (#618)
chore: bump go to 1.16 in ci workflow (#618)

The CI workflow is failing because we now depend on at least 1.16.

Signed-off-by: Lance Ball <637094cbcafd6c4c397ebad24eca1a25fa2cf312@redhat.com>
knative/func,knative/func,knative/func,knative/func,knative/func,knative/func,knative/func