Bump serde from 1.0.204 to 1.0.205 in /backend in the cargo group

[dependabot]

Bumps the cargo group in /backend with 1 update: serde.

Updates serde from 1.0.204 to 1.0.205

Release notes

Sourced from serde's releases.

v1.0.205

• Use serialize_entry instead of serialize_key + serialize_value when serialize flattened newtype enum variants (#2785, thanks @​Mingun)
• Avoid triggering a collection_is_never_read lint in the deserialization of enums containing flattened fields (#2791)

Commits

• 9b868ef Release 1.0.205
• c3eaf76 Merge pull request #2791 from dtolnay/flatten
• 32958de Skip collecting unmatched fields in variants that do not use flatten
• d64a97b Ignore confusable_idents warning in test
• c3df337 Add test of flatten in enum
• 8764353 Enable collection_is_never_read nursury lint in test
• e08c5de Merge pull request #2785 from Mingun/serialize_entry-in-flatten-newtype-variant
• bc5af50 Use serialize_entry instead of serialize_key + serialize_value when serialize...
• 28a0922 Work around test suite dead code warnings in nightly-2024-07-07
• See full diff in compare view

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