Update to Rust 1.76 #62

Job	Run time
Clippy	3m 59s
fmt	2m 44s
Test full	20s
windows-latest	5m 5s
macos-latest	3m 44s
cross (wasm32-unknown-unknown)	3m 1s
Feature coverage	6m 40s
SIMD	3m 45s
cross (i686-unknown-linux-gnu)	1m 13s
cross (powerpc-unknown-linux-gnu)	1m 19s
Miri	16m 54s
cross (powerpc64-unknown-linux-gnu)	1m 12s
MIRI on IO IPC	3m 34s
MIRI on IO IPC mmaping	3m 36s
cross (arm-linux-androideabi)	1m 28s
	58m 34s

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