chore(deps): update rust crate serde_json to v1.0.121

This MR contains the following updates:

Package	Type	Update	Change
serde_json	dev-dependencies	patch	1.0.120 -> 1.0.121
serde_json	dependencies	patch	1.0.120 -> 1.0.121

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Release Notes

serde-rs/json (serde_json)

v1.0.121

Compare Source

• Optimize position search in error path (#​1160, thanks @​purplesyringa)

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