sweet: update README.md

Just fix a bunch of stale information.

Change-Id: I0acefe2daec6c4c7d450e185bfc4206693499f7a
Reviewed-on: https://go-review.googlesource.com/c/benchmarks/+/615576
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Michael Pratt <mpratt@google.com>
1 file changed