decode_data crashes in amcache

[atcuno]

Same issue as svscan @dgmcdona

File "/home/ub/volatility3/volatility3/framework/plugins/windows/amcache.py", line 646, in <genexpr>
    (
  File "/home/ub/volatility3/volatility3/framework/plugins/windows/amcache.py", line 591, in _generator
    programs: Dict[str, _AmcacheEntry] = dict(
                                         ^^^^^
  File "/home/ub/volatility3/volatility3/framework/plugins/windows/amcache.py", line 398, in parse_inventory_app_key
    version = _get_string_value(values, val_enum.Version.value)
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/ub/volatility3/volatility3/framework/plugins/windows/amcache.py", line 156, in _get_string_value
    data = value.decode_data()
           ^^^^^^^^^^^^^^^^^^^

[atcuno]

Fixed by 263c876