Update Rust crate serde to v1.0.204

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
serde (source)	dependencies	patch	1.0.197 -> 1.0.204

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Release Notes

serde-rs/serde (serde)

v1.0.204

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• Apply #[diagnostic::on_unimplemented] attribute on Rust 1.78+ to suggest adding serde derive or enabling a "serde" feature flag in dependencies (#​2767, thanks @​weiznich)

v1.0.203

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• Documentation improvements (#​2747)

v1.0.202

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• Provide public access to RenameAllRules in serde_derive_internals (#​2743)

v1.0.201

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• Resolve unexpected_cfgs warning (#​2737)

v1.0.200

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• Fix formatting of "invalid type" and "invalid value" deserialization error messages containing NaN or infinite floats (#​2733, thanks @​jamessan)

v1.0.199

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• Fix ambiguous associated item when forward_to_deserialize_any! is used on an enum with Error variant (#​2732, thanks @​aatifsyed)

v1.0.198

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• Support serializing and deserializing Saturating<T> (#​2709, thanks @​jbethune)

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