Update Rust crate serde to v1.0.203

This MR contains the following updates:

Package	Type	Update	Change
serde (source)	dependencies	patch	1.0.201 -> 1.0.203

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Release Notes

serde-rs/serde (serde)

v1.0.203

Compare Source

• Documentation improvements (#​2747)

v1.0.202

Compare Source

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

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