Update module github.com/dgraph-io/ristretto to v0.2.0

[elastic-renovate-prod[bot]]

This PR contains the following updates:

Package	Type	Update	Change
github.com/dgraph-io/ristretto	require	minor	v0.1.1 -> v0.2.0

---

Release Notes

dgraph-io/ristretto (github.com/dgraph-io/ristretto)

### [`v0.2.0`](https://togithub.com/dgraph-io/ristretto/compare/v0.1.1...v0.2.0) [Compare Source](https://togithub.com/dgraph-io/ristretto/compare/v0.1.1...v0.2.0)

---

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• [ ] If you want to rebase/retry this PR, check this box

---

This PR has been generated by Renovate Bot.

[elastic-renovate-prod[bot]]

ℹ Artifact update notice

File name: bench/go.mod

In order to perform the update(s) described in the table above, Renovate ran the go get command, which resulted in the following additional change(s):

• 2 additional dependencies were updated

Details:

Package	Change
github.com/dustin/go-humanize	v1.0.0 -> v1.0.1
golang.org/x/sys	v0.0.0-20221010170243-090e33056c14 -> v0.11.0