Bump jsonrpsee from 0.24.9 to 0.25.1 in /backend

Bumps [jsonrpsee](https://github.com/paritytech/jsonrpsee) from 0.24.9 to 0.25.1.
- [Release notes](https://github.com/paritytech/jsonrpsee/releases)
- [Changelog](https://github.com/paritytech/jsonrpsee/blob/master/CHANGELOG.md)
- [Commits](paritytech/jsonrpsee@v0.24.9...v0.25.1)

---
updated-dependencies:
- dependency-name: jsonrpsee
  dependency-version: 0.25.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

backend/Cargo.lock

@@ -10,7 +10,7 @@
   clap = { version = "4.5", features = [ "derive" ] }
   dotenvy = { version = "0.15" }
   hex = { version = "0.4" }
-  jsonrpsee = { version = "0.24", features = [ "http-client" ] }
+  jsonrpsee = { version = "0.25", features = [ "http-client" ] }
   reqwest = { version = "0.12.22", features = [ "json" ] }
   serde = { version = "1", features = [ "derive" ] }
   serde_json = { version = "1.0", default-features = false, features = [