Update Rust crate axum to 0.8.0 (#667)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

graphql/async_graphql/Cargo.lock

@@ -7,7 +7,7 @@ edition = "2021"
 anyhow = "1.0.82"
 async-graphql = { version = "7.0.3", features = ["dataloader"] }
 async-graphql-axum = "7.0.3"
-axum = "0.7.5"
+axum = "0.8.0"
 tokio = { version = "1.37.0", features = ["macros", "rt-multi-thread", "net", "parking_lot"] }
 reqwest = { version = "0.12.4", features = ["json"] }
 serde = "1.0.200"