Update Rust crate actix-web to 4.12.0

Author: renovate[bot]

api/Cargo.lock

@@ -4,7 +4,7 @@ version = "0.0.0"
 edition = "2021"
 
 [dependencies]
-actix-web = "4.11.0"
+actix-web = "4.12.0"
 actix-web-prom = { version = "0.10.0", features = ["process"] }
 actix-files = { version = "0.6.8" }
 actix-service = { version = "2.0.3" }