Fix compile for dataset crate with vision feature (#2228)

This fixes the compile error when burn is compiled with only the `dataset` and `vision` feature enabled

burn = { default-features = false, features = ["dataset", "vision"] }

Author: PaulWagener

crates/burn-dataset/Cargo.toml

@@ -21,7 +21,7 @@ fake = ["dep:fake"]
 sqlite = ["__sqlite-shared", "dep:rusqlite"]
 sqlite-bundled = ["__sqlite-shared", "rusqlite/bundled"]
 
-vision = ["dep:flate2", "dep:globwalk", "dep:burn-common"]
+vision = ["dep:flate2", "dep:globwalk", "dep:burn-common", "dep:image"]
 
 # internal
 __sqlite-shared = [