Update to `nightly-2024.06.20` #81

Job	Run time
Lint	5m 47s
cargo-deny	1m 34s
Test (ubuntu-20.04, x86_64-unknown-linux-gnu)	4m 7s
Test (windows-2022, x86_64-pc-windows-msvc)	3m 56s
Test (macOS-latest, x86_64-apple-darwin)	3m 49s
Test (ubuntu-20.04, aarch64-linux-android, x86_64-unknown-linux-gnu)	4m 6s
test_success	0s
	23m 19s

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