Python: Borrow Python grammar language in test

Fixes the all-targets compilation error exposed while running Clippy with Rust 1.98.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Copilot-Session: aaf47101-2cb9-4d38-9f6a-e492c4da4135

Author: paldepind

python/extractor/tsg-python/tsp/bindings/rust/lib.rs

@@ -62,7 +62,7 @@ mod tests {
     fn can_load_grammar() {
         let mut parser = tree_sitter::Parser::new();
         parser
-            .set_language(super::language())
+            .set_language(&super::language())
             .expect("Error loading Python grammar");
     }
 }