docs/integrations.md: Upgrade example to astral-sh/ruff-action@v2 (#14800)
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## Summary
https://docs.astral.sh/ruff/integrations/#github-actions upgraded for
https://github.com/astral-sh/ruff-action/releases
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## Test Plan
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@eifinger Your review, please.
ruff
5aab57b3 - docs/integrations.md: Upgrade example to astral-sh/ruff-action@v2 (#14800)
