Update Flask-WTF to address test warnings (#1114)

## Fixes issue
#1054

## Description of Changes
Addressed the below error by updating `Flask-WTF`:
```console
../../local/lib/python3.11/site-packages/flask_wtf/recaptcha/widgets.py:2: 10 warnings
  /usr/local/lib/python3.11/site-packages/flask_wtf/recaptcha/widgets.py:2: DeprecationWarning: 'flask.Markup' is deprecated and will be removed in Flask 2.4. Import 'markupsafe.Markup' instead.
    from flask import Markup
```

## Tests and Linting
 - [x] This branch is up-to-date with the `develop` branch.
 - [x] `pytest` passes on my local development environment.
 - [x] `pre-commit` passes on my local development environment.
 - [x] Verified warning is no longer in the `warnings summary`.

```console
=============================== warnings summary ===============================
OpenOversight/tests/test_commands.py::test_add_department__duplicate
OpenOversight/tests/test_models.py::test__uuid_uniqueness_constraint
OpenOversight/tests/routes/test_singular_redirects.py::test_redirect_add_salary
  /usr/src/app/OpenOversight/tests/conftest.py:325: SAWarning: transaction already deassociated from connection
    transaction.rollback()

OpenOversight/tests/test_models.py::test_salary_repr
  /usr/src/app/OpenOversight/tests/test_models.py:170: SAWarning: Dialect sqlite+pysqlite does *not* support Decimal objects natively, and SQLAlchemy must convert from floating point - rounding errors and other issues may occur. Please consider storing Decimal numbers as strings or integers on this platform for lossless storage.
    salary = Salary.query.first()

OpenOversight/tests/test_database_cache.py::test_documented_assignments
OpenOversight/tests/test_functional.py::test_incident_detail_display_read_more_button_for_descriptions_over_cutoff
  /usr/local/lib/python3.11/site-packages/jinja2/environment.py:487: SAWarning: Dialect sqlite+pysqlite does *not* support Decimal objects natively, and SQLAlchemy must convert from floating point - rounding errors and other issues may occur. Please consider storing Decimal numbers as strings or integers on this platform for lossless storage.
    return getattr(obj, attribute)

OpenOversight/tests/test_commands.py::test_csv_import_new
  /usr/src/app/OpenOversight/tests/conftest.py:855: SAWarning: Dialect sqlite+pysqlite does *not* support Decimal objects natively, and SQLAlchemy must convert from floating point - rounding errors and other issues may occur. Please consider storing Decimal numbers as strings or integers on this platform for lossless storage.
    if len(list(officer.salaries)) > 0:

OpenOversight/tests/test_commands.py::test_csv_new_salary
  /usr/src/app/OpenOversight/tests/test_commands.py:463: FutureWarning: Setting an item of incompatible dtype is deprecated and will raise an error in a future version of pandas. Value '123456.78' has dtype incompatible with float64, please explicitly cast to a compatible dtype first.
    df.loc[0, "salary"] = "123456.78"

OpenOversight/tests/test_functional.py: 138 warnings
  /usr/local/lib/python3.11/site-packages/selenium/webdriver/remote/remote_connection.py:418: DeprecationWarning: HTTPResponse.getheader() is deprecated and will be removed in urllib3 v2.1.0. Instead use HTTPResponse.headers.get(name, default).
    if resp.getheader('Content-Type') is not None:

OpenOversight/tests/test_functional.py: 138 warnings
  /usr/local/lib/python3.11/site-packages/selenium/webdriver/remote/remote_connection.py:419: DeprecationWarning: HTTPResponse.getheader() is deprecated and will be removed in urllib3 v2.1.0. Instead use HTTPResponse.headers.get(name, default).
    content_type = resp.getheader('Content-Type').split(';')

-- Docs: https://docs.pytest.org/en/stable/how-to/capture-warnings.html

---------- coverage: platform linux, python 3.11.9-final-0 -----------
```

requirements.txt

@@ -28,7 +28,7 @@ Flask-Mail==0.9.1
 Flask-Migrate==4.0.4
 Flask-Sitemap==0.4.0
 Flask-SQLAlchemy==3.0.5
-Flask-WTF==1.1.1
+Flask-WTF==1.1.2
 google-api-python-client==2.92.0
 gunicorn==22.0.0
 httplib2==0.22.0