fix: simplify repository opening logic in append_date_and_git_hash function

src/lib.rs

@@ -104,7 +104,7 @@ fn append_date_and_git_hash(output_path: &mut Option<PathBuf>, config: &Config)
 
         if config.append_git_hash {
             for dir in &config.directory {
-                match Repository::open(&dir) {
+                match Repository::open(dir) {
                     Ok(repo) => {
                         let head = repo.head().context("Failed to get repository HEAD")?;
                         if let Some(oid) = head.target() {