Update Rust crate leptos_router to v0.5.4

Author: renovate[bot]

sources/web-gen-api-axum/Cargo.toml

@@ -14,7 +14,7 @@ cfg-if = "1"
 leptos = { version = "0.4", features = ["nightly"] }
 leptos_axum = { version = "0.4", optional = true }
 leptos_meta = { version = "0.4", features = ["nightly"] }
-leptos_router = { version = "0.4", features = ["nightly"] }
+leptos_router = { version = "0.5", features = ["nightly"] }
 log = "0.4"
 simple_logger = "4"
 tokio = { version = "1.25.0", optional = true }