build(deps)(deps): bump the backend-dependencies group with 2 updates

Bumps the backend-dependencies group with 2 updates: [tower-http](https://github.com/tower-rs/tower-http) and [axum-test](https://github.com/JosephLenton/axum-test).


Updates `tower-http` from 0.6.0 to 0.6.1
- [Release notes](https://github.com/tower-rs/tower-http/releases)
- [Commits](tower-rs/tower-http@tower-http-0.6.0...tower-http-0.6.1)

Updates `axum-test` from 15.7.3 to 15.7.4
- [Commits](https://github.com/JosephLenton/axum-test/commits)

---
updated-dependencies:
- dependency-name: tower-http
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: backend-dependencies
- dependency-name: axum-test
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: backend-dependencies
...

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

Cargo.toml

@@ -32,7 +32,7 @@ valico = "4.0.0"
 tokio = { version = "1", features = ["rt", "macros", "rt-multi-thread"] }
 tokio-test = "0.4.4"
 tower = "0.5.1"
-tower-http = { version = "0.6.0", features = ["trace", "fs", "cors"] }
+tower-http = { version = "0.6.1", features = ["trace", "fs", "cors"] }
 hyper = "1.4.1"
 regex = "1.10.6"
 thiserror = "1.0.64"
@@ -49,7 +49,7 @@ url = { version = "2", features = ["serde"] }
 
 [dev-dependencies]
 assert_cmd = "2.0.16"
-axum-test = "15.7.3"
+axum-test = "15.7.4"
 fake = "2.9.2"
 
 [[bin]]