Update Rust crate tokio to 1.21.1

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
tokio (source)	dependencies	patch	1.21.0 -> 1.21.1

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Release Notes

tokio-rs/tokio

### [`v1.21.1`](https://togithub.com/tokio-rs/tokio/releases/tag/tokio-1.21.1) [Compare Source](https://togithub.com/tokio-rs/tokio/compare/tokio-1.21.0...tokio-1.21.1) ### 1.21.1 (September 13, 2022) ##### Fixed - net: fix dependency resolution for socket2 ([#​5000]) - task: ignore failure to set TLS in `LocalSet` Drop ([#​4976]) [#​4976]: https://togithub.com/tokio-rs/tokio/pull/4976 [#​5000]: https://togithub.com/tokio-rs/tokio/pull/5000

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