Reverts incorrectly renamed comment (anza-xyz#537)

runtime/src/serde_snapshot/tests.rs

@@ -889,7 +889,7 @@ mod serde_snapshot_tests {
  let tmp = tempfile::tempdir().unwrap();
  let original_path = tmp.path().join("123.456");
 
- // In remap_accounts_file() we want to handle EEXIST (collisions), but we want to return all
+ // In remap_append_vec_file() we want to handle EEXIST (collisions), but we want to return all
  // other errors
  let next_append_vec_id = AtomicAccountsFileId::new(457);
  let num_collisions = AtomicUsize::new(0);