Contracts: Bump polkavm (#2884)

bump polkavm-x deps to 0.4.0

substrate/frame/contracts/uapi/Cargo.toml

@@ -8,9 +8,8 @@ homepage = "https://substrate.io"
 repository.workspace = true
 description = "Exposes all the host functions that a contract can import."
 
-# [lints]
-# TODO: uncomment when rve toolchain is updated to rust 1.74 or greater.
-# workspace = true
+[lints]
+workspace = true
 
 [dependencies]
 paste = { version = "1.0", default-features = false }
@@ -22,7 +21,7 @@ scale = { package = "parity-scale-codec", version = "3.6.1", default-features =
 ], optional = true }
 
 [target.'cfg(target_arch = "riscv32")'.dependencies]
-polkavm-derive = '0.2.0'
+polkavm-derive = '0.4.0'
 
 [features]
 default = ["scale"]