Fix clippy

crates/cast/bin/cmd/wallet/mod.rs

@@ -364,7 +364,7 @@ flag to set your key via:
 
                     // List all files in keystore directory
                     let keystore_files: Result<Vec<_>, eyre::Report> =
-                        std::fs::read_dir(&keystore_dir)
+                        std::fs::read_dir(keystore_dir)
                             .wrap_err("Failed to read the directory")?
                             .filter_map(|entry| match entry {
                                 Ok(entry) => {