fix: change duplicate 'MB' to 'GB'

src/builtins/ls.rs

@@ -60,7 +60,7 @@ fn format_filesize(filesize: u64) -> String {
     } else if filesize > 999_999 && filesize <= 999_999_999 {
         format!("{}MB", filesize / 1_000_000)
     } else if filesize > 999_999_999 {
-        format!("{}MB", filesize / 1_000_000_000)
+        format!("{}GB", filesize / 1_000_000_000)
     } else {
         format!("{}B", filesize)
     }