Allow CI to continue on nightly failure #192

Job	Run time
Miri	53s
Rust (ubuntu-latest, x86_64, stable)	1m 4s
Rust (ubuntu-latest, x86_64, beta)	1m 1s
Rust (ubuntu-latest, x86_64, nightly)	1m 6s
Rust (ubuntu-latest, x86_64, 1.70.0)	1m 7s
Rust (ubuntu-latest, i686, stable)	17s
Rust (ubuntu-latest, i686, beta)	28s
Rust (ubuntu-latest, i686, nightly)	27s
Rust (ubuntu-latest, i686, 1.70.0)	27s
Rust (ubuntu-latest, aarch64, stable)	23s
Rust (ubuntu-latest, aarch64, beta)	25s
Rust (ubuntu-latest, aarch64, nightly)	30s
Rust (ubuntu-latest, aarch64, 1.70.0)	27s
Rust (windows-latest, x86_64, stable)	1m 58s
Rust (windows-latest, x86_64, beta)	2m 25s
Rust (windows-latest, x86_64, nightly)	2m 1s
Rust (windows-latest, x86_64, 1.70.0)	2m 18s
Rust (windows-latest, i686, stable)	51s
Rust (windows-latest, i686, beta)	43s
Rust (windows-latest, i686, nightly)	42s
Rust (windows-latest, i686, 1.70.0)	42s
Rust (windows-latest, aarch64, stable)	1m 11s
Rust (windows-latest, aarch64, beta)	1m 3s
Rust (windows-latest, aarch64, nightly)	1m 6s
Rust (windows-latest, aarch64, 1.70.0)	46s
	24m 21s

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