chore(deps-rs): bump bytemuck from 1.20.0 to 1.21.0 in the minor group #2509

Job	Run time
Check for changes	6s
Check Python code 🐍	1m 50s
Build benchmarks 🏋️	4m 21s
Check Rust code 🦀	1m 54s
tests (Rust stable, all features)	2m 4s
tests (Rust stable, no features)	2m 2s
tests (Rust nightly, coverage)	2m 37s
tests (Python, coverage)	2m 4s
tests (Rust 1.75)	2m 34s
tests (Rust beta)	2m 31s
Check standard extensions	1m 8s
Required checks 🦀+🐍	1s
	23m 12s

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