fix(deps): update rust crate tokio to 1.40.0 (#18429)

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

Author: renovate[bot]

boundaries/billing/currency/Cargo.toml

@@ -26,7 +26,7 @@ serde_json = "1.0.128"
 # Other
 rust_decimal = { version = "1.36", features = ["serde"] }
 rust_decimal_macros = "1.36.0"
-tokio = { version = "1.38.1", features = ["full"] }
+tokio = { version = "1.40.0", features = ["full"] }
 async-trait = "0.1.83"
 warp = "0.3.7"
 utoipa = "4.2.3"