Update etcd-client requirement from 0.10 to 0.11 (#845)

Updates the requirements on [etcd-client](https://github.com/etcdv3/etcd-client) to permit the latest version.
- [Release notes](https://github.com/etcdv3/etcd-client/releases)
- [Commits](etcdv3/etcd-client@v0.10.0...v0.11.1)

---
updated-dependencies:
- dependency-name: etcd-client
  dependency-type: direct:production
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

ballista/scheduler/Cargo.toml

@@ -53,7 +53,7 @@ configure_me = { workspace = true }
 dashmap = "5.4.0"
 datafusion = { workspace = true }
 datafusion-proto = { workspace = true }
-etcd-client = { version = "0.10", optional = true }
+etcd-client = { version = "0.11", optional = true }
 flatbuffers = { version = "23.5.26" }
 futures = "0.3"
 graphviz-rust = "0.6.1"