chore(deps): update rust crates

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
serde_json	dependencies	patch	1.0.122 -> 1.0.124
syn	dependencies	patch	2.0.72 -> 2.0.74

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Release Notes

serde-rs/json (serde_json)

v1.0.124

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• Fix a bug in processing string escapes in big-endian architectures (#​1173, thanks @​purplesyringa)

v1.0.123

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• Optimize string parsing by applying SIMD-within-a-register: 30.3% improvement on twitter.json from 613 MB/s to 799 MB/s (#​1161, thanks @​purplesyringa)

dtolnay/syn (syn)

v2.0.74

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• Fix "temporary is dropped and runs the destructor for type `impl Iterator`" regression affecting certain use of Generics iterator methods (#​1719)

v2.0.73

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• Support parsing unnamed C varargs within function pointer types (#​1711)
• Improve synthesized error message on unexpected tokens at the end of the expected contents of a delimited group (#​1713)
• Support parsing unstable tail call syntax (#​1714, https://github.com/rust-lang/rust/issues/112788)
• Add Fields::members iterator (#​1716, thanks @​Fancyflame)

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