Bump axum from 0.7.9 to 0.8.1

Bumps [axum](https://github.com/tokio-rs/axum) from 0.7.9 to 0.8.1.
- [Release notes](https://github.com/tokio-rs/axum/releases)
- [Changelog](https://github.com/tokio-rs/axum/blob/main/CHANGELOG.md)
- [Commits](https://github.com/tokio-rs/axum/commits)

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

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

crates/protocol/Cargo.toml

@@ -34,7 +34,7 @@ hpke-rs-rust-crypto="0.2.0"
 num                ="0.4.3"
 
 # Used only with the `server` feature to implement the WsConnection trait
-axum             ={ version="0.7.9", features=["ws"], optional=true }
+axum             ={ version="0.8.1", features=["ws"], optional=true }
 tokio-tungstenite={ version="0.26.1", optional=true }
 
 # Used only with the `wasm` feature

crates/testing-utils/Cargo.toml

@@ -17,7 +17,7 @@ parity-scale-codec="3.6.12"
 lazy_static="1.5.0"
 hex-literal="0.4.1"
 tokio={ version="1.42", features=["macros", "fs", "rt-multi-thread", "io-util", "process"] }
-axum={ version="0.7.9" }
+axum={ version="0.8.1" }
 entropy-shared={ version="0.3.0", path="../shared" }
 entropy-kvdb={ version="0.3.0", path="../kvdb", default-features=false }
 entropy-tss={ version="0.3.0", path="../threshold-signature-server", features=["test_helpers"] }

crates/threshold-signature-server/Cargo.toml

@@ -32,7 +32,7 @@ tokio  ={ version="1.42", features=["macros", "fs", "rt-multi-thread", "io-util"
 
 # HTTP
 reqwest={ version="0.12.9", features=["json", "stream"] }
-axum   ={ version="0.7.9", features=["ws"] }
+axum   ={ version="0.8.1", features=["ws"] }
 
 # Substrate
 subxt             ="0.35.3"