Update dependency rack to v3.0.9

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
rack (changelog)	'3.0.8' -> '3.0.9'

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Release Notes

rack/rack (rack)

### [`v3.0.9`](https://togithub.com/rack/rack/compare/v3.0.8...v3.0.9) [Compare Source](https://togithub.com/rack/rack/compare/v3.0.8...v3.0.9)

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Configuration

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[yegor256]

@rultor merge

[rultor]

@rultor merge

@yegor256 OK, I'll try to merge now. You can check the progress of the merge here

[rultor]

@rultor merge

@yegor256 Done! FYI, the full log is here (took me 4min)