Merge pull request #12 from thomasjpfan/typo_struct

Fix typo in struct.md

docs/struct.md

@@ -21,7 +21,7 @@ def shift_struct(expr: IntoExpr) -> pl.Expr:
     )
 ```
 
-On the Roost side, we need to start by activating the necessary
+On the Rust side, we need to start by activating the necessary
 feature - in `Cargo.toml`, please make this change:
 ```diff
 -polars = { version = "0.37.0", default-features = false }