timezone error in macos arm

This appears to affect more than macOS arm, I'm seeing the same issue after updating to the development release of Ubuntu Plucky (amd64):

```
jsimpso@nautilus:~$ sudo apt-cache policy brz
brz:
  Installed: 3.3.10-1
  Candidate: 3.3.10-1
  Version table:
 *** 3.3.10-1 500
        500 http://au.archive.ubuntu.com/ubuntu plucky/universe amd64 Packages
        100 /var/lib/dpkg/status
```

Trying to run any breezy command fails as so:
```
jsimpso@nautilus:~$ brz version
Error: PyErr { type: <class 'zoneinfo._common.ZoneInfoNotFoundError'>, value: ZoneInfoNotFoundError('No time zone found with key AWST'), traceback: Some(<traceback object at 0x780e6abe9140>) }
```

Trying to run `breezy.initialize` in a python shell raises the following traceback:
```
>>> import breezy
>>> breezy.version_info
(3, 3, 10, 'final', 0)
>>> breezy.initialize()
Traceback (most recent call last):
  File "/usr/lib/python3.13/zoneinfo/_common.py", line 12, in load_tzdata
    return resources.files(package_name).joinpath(resource_name).open("rb")
           ~~~~~~~~~~~~~~~^^^^^^^^^^^^^^
  File "/usr/lib/python3.13/importlib/resources/_common.py", line 46, in wrapper
    return func(anchor)
  File "/usr/lib/python3.13/importlib/resources/_common.py", line 56, in files
    return from_package(resolve(anchor))
                        ~~~~~~~^^^^^^^^
  File "/usr/lib/python3.13/functools.py", line 934, in wrapper
    return dispatch(args[0].__class__)(*args, **kw)
           ~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^
  File "/usr/lib/python3.13/importlib/resources/_common.py", line 82, in _
    return importlib.import_module(cand)
           ~~~~~~~~~~~~~~~~~~~~~~~^^^^^^
  File "/usr/lib/python3.13/importlib/__init__.py", line 88, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
           ~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<frozen importlib._bootstrap>", line 1387, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1360, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1310, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 488, in _call_with_frames_removed
  File "<frozen importlib._bootstrap>", line 1387, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1360, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1324, in _find_and_load_unlocked
ModuleNotFoundError: No module named 'tzdata'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<python-input-25>", line 1, in <module>
    breezy.initialize()
    ~~~~~~~~~~~~~~~~~^^
  File "/usr/lib/python3/dist-packages/breezy/__init__.py", line 216, in initialize
    state._start()
    ~~~~~~~~~~~~^^
  File "/usr/lib/python3/dist-packages/breezy/library_state.py", line 103, in _start
    self._trace.__enter__()
    ~~~~~~~~~~~~~~~~~~~~~^^
  File "/usr/lib/python3/dist-packages/breezy/trace.py", line 665, in __enter__
    self._original_state = enable_default_logging()
                           ~~~~~~~~~~~~~~~~~~~~~~^^
  File "/usr/lib/python3/dist-packages/breezy/trace.py", line 290, in enable_default_logging
    start_time = osutils.format_local_d...

Happy to report that I just received a package update which seems to have fixed this on Plucky:

```
jsimpso@nautilus:~$ sudo apt-cache policy brz
brz:
  Installed: 3.3.10-1ubuntu1
  Candidate: 3.3.10-1ubuntu1
  Version table:
 *** 3.3.10-1ubuntu1 500
        500 http://au.archive.ubuntu.com/ubuntu plucky/universe amd64 Packages
        100 /var/lib/dpkg/status
jsimpso@nautilus:~$ brz version
Breezy (brz) 3.3.10
```

Thanks!