Update Rust crate serde to 1.0.197

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
serde (source)	dependencies	patch	1.0.196 -> 1.0.197

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Release Notes

serde-rs/serde (serde)

### [`v1.0.197`](https://togithub.com/serde-rs/serde/releases/tag/v1.0.197) [Compare Source](https://togithub.com/serde-rs/serde/compare/v1.0.196...v1.0.197) - Fix unused_imports warnings when compiled by rustc 1.78 - Optimize code size of some Display impls ([#​2697](https://togithub.com/serde-rs/serde/issues/2697), thanks [@​nyurik](https://togithub.com/nyurik))

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