bug fix: use pydantic v2 model.model_rebuild

[AJamesPhillips]

What kind of change does this PR introduce?

Bug fix

What is the current behavior?

When I run tests I see the following warnings:

(venv) ... % pytest src/tests/integration/test_abc.py       
=========================================================================================== test session starts ============================================================================================
platform darwin -- Python 3.9.13, pytest-7.4.3, pluggy-1.3.0
rootdir: /Users/...
configfile: pytest.ini
plugins: anyio-4.1.0
collected 7 items                                                                                                                                                                                          

src/tests/integration/test_abc.py .......                                                                                                                                                    [100%]

============================================================================================= warnings summary =============================================================================================
venv/lib/python3.9/site-packages/gotrue/types.py:679: 19 warnings
  /Users/.../venv/lib/python3.9/site-packages/gotrue/types.py:679: PydanticDeprecatedSince20: The `update_forward_refs` method is deprecated; use `model_rebuild` instead. Deprecated in Pydantic V2.0 to be removed in V3.0. See Pydantic V2 Migration Guide at https://errors.pydantic.dev/2.3/migration/
    model.update_forward_refs()

venv/lib/python3.9/site-packages/pydantic/main.py:1206: 19 warnings
  /Users/.../venv/lib/python3.9/site-packages/pydantic/main.py:1206: PydanticDeprecatedSince20: The `update_forward_refs` method is deprecated; use `model_rebuild` instead. Deprecated in Pydantic V2.0 to be removed in V3.0. See Pydantic V2 Migration Guide at https://errors.pydantic.dev/2.3/migration/
    warnings.warn(

-- Docs: https://docs.pytest.org/en/stable/how-to/capture-warnings.html
====================================================================================== 7 passed, 38 warnings in 1.77s ======================================================================================

What is the new behavior?

No warning messages are seen

Additional context

None

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (fbddd6d) 45.37% compared to head (9d723df) 45.26%.
Report is 4 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #373      +/-   ##
==========================================
- Coverage   45.37%   45.26%   -0.11%     
==========================================
  Files          23       23              
  Lines        1955     1955              
==========================================
- Hits          887      885       -2     
- Misses       1068     1070       +2     

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[silentworks]

Looks good, thank you for this PR.