Fix default storage target value

[SchrodingersGat]

Follow-up to #10140

Without this change, get this error on invoke update

Waiting for database connection...
Python version 3.11.11 - /home/inventree/dev/venv/bin/python3
Traceback (most recent call last):
  File "/home/inventree/src/backend/InvenTree/manage.py", line 24, in <module>
    main()
  File "/home/inventree/src/backend/InvenTree/manage.py", line 20, in main
    execute_from_command_line(sys.argv)
  File "/home/inventree/dev/venv/lib/python3.11/site-packages/django/core/management/__init__.py", line 442, in execute_from_command_line
    utility.execute()
  File "/home/inventree/dev/venv/lib/python3.11/site-packages/django/core/management/__init__.py", line 382, in execute
    settings.INSTALLED_APPS
  File "/home/inventree/dev/venv/lib/python3.11/site-packages/django/conf/__init__.py", line 102, in __getattr__
    self._setup(name)
  File "/home/inventree/dev/venv/lib/python3.11/site-packages/django/conf/__init__.py", line 89, in _setup
    self._wrapped = Settings(settings_module)
                    ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/inventree/dev/venv/lib/python3.11/site-packages/django/conf/__init__.py", line 217, in __init__
    mod = importlib.import_module(self.SETTINGS_MODULE)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<frozen importlib._bootstrap>", line 1204, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1176, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1147, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 690, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 940, in exec_module
  File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
  File "/home/inventree/src/backend/InvenTree/InvenTree/settings.py", line 1569, in <module>
    STORAGE_TARGET, STORAGES, _media = storages.init_storages()
                                       ^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/inventree/src/backend/InvenTree/InvenTree/setting/storages.py", line 35, in init_storages
    raise ValueError(f"Invalid storage target: '{target}'")
ValueError: Invalid storage target: 'StorageBackends.LOCAL'

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 87.80%. Comparing base (edd920e) to head (55c9d3e).
⚠️ Report is 2 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master   #10718   +/-   ##
=======================================
  Coverage   87.80%   87.80%           
=======================================
  Files        1277     1277           
  Lines       57503    57503           
  Branches     2023     2023           
=======================================
+ Hits        50489    50492    +3     
+ Misses       6514     6511    -3     
  Partials      500      500           

Flag	Coverage Δ
backend	89.55% <100.00%> (+<0.01%)	⬆️

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Components	Coverage Δ
Backend Apps	91.88% <ø> (ø)
Backend General	93.66% <ø> (ø)
Frontend	70.09% <ø> (ø)

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