build(deps): bump futures from 0.3.30 to 0.3.31 (#110)

Bumps [futures](https://github.com/rust-lang/futures-rs) from 0.3.30 to 0.3.31.
- [Release notes](https://github.com/rust-lang/futures-rs/releases)
- [Changelog](https://github.com/rust-lang/futures-rs/blob/master/CHANGELOG.md)
- [Commits](rust-lang/futures-rs@0.3.30...0.3.31)

---
updated-dependencies:
- dependency-name: futures
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

examples/Cargo.toml

@@ -15,7 +15,7 @@ path = "src/producer-server.rs"
 [dependencies]
 actix-web = "4.9.0"
 dotenv = "0.15.0"
-futures = "0.3.30"
+futures = "0.3.31"
 rand = "0.8.5"
 sdk = { path = "../sdk" }
 serde_json = "1.0.128"

server/Cargo.toml

@@ -10,7 +10,7 @@ actix-web = "4.9.0"
 chrono = { version = "0.4.38", features = ["serde"] }
 dotenv = "0.15.0"
 envconfig = "0.11.0"
-futures = "0.3.30"
+futures = "0.3.31"
 futures-lite = "2.3.0"
 itertools = "0.13.0"
 lapin = "2.5.0"