Bump serde_json from 1.0.121 to 1.0.122 in /rs-flasher

[dependabot[bot]]

Bumps serde_json from 1.0.121 to 1.0.122.

Release notes

Sourced from serde_json's releases.

v1.0.122

• Support using json! in no-std crates (#1166)

Commits

• 54381d6 Release 1.0.122
• 16fb6e0 Work around buggy rust-analyzer behavior
• 49d7d66 Merge pull request #1166 from dtolnay/allocvec
• 6827c7b Fix json! invocations when std prelude is not in scope
• 611b2a4 Merge pull request #1165 from serde-rs/jsonmac
• 7633cb7 Eliminate local_inner_macros in favor of non-ident macro paths
• See full diff in compare view

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[dependabot[bot]]

Superseded by #312.