chore: upgrade to `iroh@v0.31.0` #135

Job	Run time
Android Build Only (aarch64-linux-android)	1m 10s
Cross Build Only (x86_64-unknown-freebsd)	49s
Android Build Only (armv7-linux-androideabi)	1m 11s
cargo deny	29s
Checking docs	1m 43s
Checking fmt	26s
check_semver	1m 37s
clippy_check	2m 53s
codespell	7s
Cross Test (i686-unknown-linux-gnu)	1m 5s
Minimal Supported Rust Version	1m 37s
CI Test Suite / Tests (ubuntu-latest, stable, all)	2m 8s
CI Test Suite / Tests (ubuntu-latest, stable, none)	1m 7s
CI Test Suite / Tests (ubuntu-latest, stable, default)	1m 35s
CI Test Suite / Tests (macOS-arm-latest, stable, all)	2m 9s
CI Test Suite / Tests (macOS-arm-latest, stable, none)	1m 25s
CI Test Suite / Tests (windows-latest, stable, all, x86_64-pc-windows-msvc)	3m 6s
CI Test Suite / Tests (macOS-arm-latest, stable, default)	1m 41s
CI Test Suite / Tests (windows-latest, stable, none, x86_64-pc-windows-msvc)	1m 44s
CI Test Suite / Tests (windows-latest, stable, default, x86_64-pc-windows-msvc)	2m 6s
	30m 8s

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