switched deprecated dep for maintained dep

backend/task/Cargo.toml

@@ -19,7 +19,7 @@ dotenvy = "0.15.7"
 futures = "0.3.30"
 markdown = "1.0.0-alpha.20"
 serde = { version = "*", features = ["derive"] }
-serde_yaml = "*"
+serde_yml = "*"
 aws-sdk-s3 = "1.77.0"
 tracing = "0.1"
 tracing-subscriber = { version = "0.3.18", features = ["env-filter"] }