Update Rust crate bytes to 1.2.1

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
bytes	dependencies	patch	1.2.0 -> 1.2.1

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Release Notes

tokio-rs/bytes

### [`v1.2.1`](https://togithub.com/tokio-rs/bytes/blob/HEAD/CHANGELOG.md#​121-July-30-2022) [Compare Source](https://togithub.com/tokio-rs/bytes/compare/v1.2.0...v1.2.1) ##### Fixed - Fix unbounded memory growth when using `reserve` ([#​560](https://togithub.com/tokio-rs/bytes/issues/560))

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