[flake8-pyi] Fix PYI047 false negatives on PEP-695 type aliases

[AlexWaygood]

Summary

Fixes one of the issues listed in #8771. Fairly straightforward!

Test Plan

cargo test / cargo insta review

[codspeed-hq]

CodSpeed Performance Report

Merging #9566 will degrade performances by 4.35%

_{Comparing AlexWaygood:y047-695 (209182b) with main (368e279)}

Summary

❌ 1 regressions
✅ 29 untouched benchmarks

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Benchmarks breakdown

	Benchmark	main	AlexWaygood:y047-695	Change
❌	parser[numpy/ctypeslib.py]	12.2 ms	12.8 ms	-4.35%

[github-actions]

ruff-ecosystem results

Linter (stable)

✅ ecosystem check detected no linter changes.

Linter (preview)

✅ ecosystem check detected no linter changes.

[charliermarsh]

Nice, looking good!