deps: Bump serde from 1.0.215 to 1.0.216 #1372

Job	Run time
Validate PR title	2s
Build on x86_64-apple-darwin	1m 55s
Check formatting (Prettier)	3s
Build on aarch64-apple-darwin	2m 45s
Build on x86_64-pc-windows-msvc	8m 12s
Build on x86_64-unknown-linux-gnu	3m 12s
rustfmt	18s
Test on x86_64-apple-darwin	1m 53s
clippy	1m 46s
Test on x86_64-pc-windows-msvc	3m 32s
Test on x86_64-unknown-linux-gnu	1m 6s
Check rustdoc intra-doc links	1m 50s
	26m 34s

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