Fix clippy::needless_borrow lint violations (#36444)

Release Notes:

- N/A

crates/repl/src/notebook/notebook_ui.rs

@@ -575,7 +575,7 @@ impl project::ProjectItem for NotebookItem {
                     .with_context(|| format!("finding the absolute path of {path:?}"))?;
 
                 // todo: watch for changes to the file
-                let file_content = fs.load(&abs_path.as_path()).await?;
+                let file_content = fs.load(abs_path.as_path()).await?;
                 let notebook = nbformat::parse_notebook(&file_content);
 
                 let notebook = match notebook {