[flake8-type-checking] Make example error out-of-the-box (TC001)

[MeGaGiGaGon]

Summary

Part of #18972

This PR makes typing-only-first-party-import (TC001)'s example error out-of-the-box. The old example raised TC002 instead of TC001, so this makes it a from . import to fix that.

Old example

from __future__ import annotations

import local_module


def func(sized: local_module.Container) -> int:
    return len(sized)

New example

from __future__ import annotations

from . import local_module


def func(sized: local_module.Container) -> int:
    return len(sized)

The "Use instead" section was also modified similarly.

Test Plan

N/A, no functionality/tests affected

[github-actions]

ruff-ecosystem results

Linter (stable)

✅ ecosystem check detected no linter changes.

Linter (preview)

✅ ecosystem check detected no linter changes.

[dylwil3]

Thank you!