Update Rust crate heapless to 0.9

Author: renovate[bot]

Cargo.lock

@@ -12,6 +12,6 @@ serde = { version = "1", features = ["derive"] }
 serde_json = "1"
 thiserror = "2"
 linear-map = "1.2"
-heapless = "0.8"
+heapless = "0.9"
 dofus_characteristics = { path = "../dofus_characteristics" }
 dofus_items = { path = "../dofus_items" }