chore(deps): update dependency flask to v3.0.3

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
Flask (changelog)	==3.0.0 -> ==3.0.3

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Release Notes

pallets/flask (Flask)

v3.0.3

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Released 2024-04-07

• The default hashlib.sha1 may not be available in FIPS builds. Don't access it at import time so the developer has time to change the default. :issue:5448
• Don't initialize the cli attribute in the sansio scaffold, but rather in the Flask concrete class. :pr:5270

v3.0.2

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Released 2024-02-03

• Correct type for jinja_loader property. :issue:5388
• Fix error with --extra-files and --exclude-patterns CLI options. :issue:5391

v3.0.1

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Released 2024-01-18

• Correct type for path argument to send_file. :issue:5230
• Fix a typo in an error message for the flask run --key option. :pr:5344
• Session data is untagged without relying on the built-in json.loads object_hook. This allows other JSON providers that don't implement that. :issue:5381
• Address more type findings when using mypy strict mode. :pr:5383

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