cmd/bench: update location of gopls benchmarks

Change-Id: I5a86759412beb2e824160323d43fd7e063e0b359
Reviewed-on: https://go-review.googlesource.com/c/benchmarks/+/545817
Reviewed-by: Alan Donovan <adonovan@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
1 file changed