src/checkout.rs: update an error message

src/checkout.rs

@@ -102,7 +102,7 @@ pub fn prepare_checkout() {
     let res = is_diff(&commit_id, &tmp_name, &borg_path);
     commit::delete_commit(&tmp_name, &borg_path);
     if res {
-        eprintln!("Your results folder contains unsaved changes!\nPlease update your current commit with:  gbl commit --update");
+        eprintln!("Your results folder contains unsaved changes!\nPlease update your current commit with:  gblk commit --update");
         exit(4);
     }
 }