Renovate: Update Rust crate serde to v1.0.215

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
serde (source)	dependencies	patch	1.0.214 -> 1.0.215

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Release Notes

serde-rs/serde (serde)

v1.0.215

Compare Source

• Produce warning when multiple fields or variants have the same deserialization name (#​2855, #​2856, #​2857)

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