ci: Bump dtolnay/rust-toolchain from 1482605bf to a54c7afa9 #1376

Job	Run time
Validate PR title	3s
Check formatting (Prettier)	6s
Build on x86_64-apple-darwin	2m 41s
Build on aarch64-apple-darwin	2m 38s
Build on x86_64-pc-windows-msvc	5m 58s
Build on x86_64-unknown-linux-gnu	3m 5s
clippy	1m 36s
Check rustdoc intra-doc links	1m 45s
rustfmt	17s
Test on x86_64-apple-darwin	2m 21s
Test on x86_64-pc-windows-msvc	2m 43s
Test on x86_64-unknown-linux-gnu	1m 0s
	24m 13s

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