Bump graphql-ws-client from 0.5.0 to 0.8.2 in /backend

Bumps [graphql-ws-client](https://github.com/obmarg/graphql-ws-client) from 0.5.0 to 0.8.2.
- [Release notes](https://github.com/obmarg/graphql-ws-client/releases)
- [Changelog](https://github.com/obmarg/graphql-ws-client/blob/main/CHANGELOG.md)
- [Commits](obmarg/graphql-ws-client@v0.5.0...v0.8.2)

---
updated-dependencies:
- dependency-name: graphql-ws-client
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

backend/Cargo.lock

@@ -11,7 +11,7 @@ clap = { workspace = true }
 cynic = { version = "3.4.3", features = ["http-reqwest"] }
 dotenvy = { workspace = true }
 futures-util = { version = "0.3.30" }
-graphql-ws-client = { version = "0.5.0", features = ["cynic"] }
+graphql-ws-client = { version = "0.8.2", features = ["cynic"] }
 lapin = { version = "2.3.3", default-features = false, features = ["rustls"] }
 reqwest = { version = "0.11.24" }
 tokio = { workspace = true, features = ["sync"] }