build(deps): update nix requirement from 0.30.1 to 0.31.3 #9710

Job	Run time
quiche	6m 40s
docker	2m 40s
quiche_ios (aarch64-apple-ios)	1m 46s
http3_test	1m 27s
quiche_ios (x86_64-apple-ios)	1m 48s
quiche_multiarch (i686-unknown-linux-gnu)	3m 11s
quiche_multiarch (armv7-unknown-linux-gnueabihf)	5m 51s
quiche_macos (macos-15-intel)	8m 59s
android_ndk_lts (armv7-linux-androideabi)	1m 27s
quiche_multiarch (aarch64-unknown-linux-gnu)	5m 26s
quiche_macos (macos-latest)	3m 53s
android_ndk_lts (i686-linux-android)	1m 37s
quiche_windows (i686-pc-windows-msvc)	6m 18s
quiche_windows (x86_64-pc-windows-gnu)	7m 35s
android_ndk_lts (x86_64-linux-android)	1m 46s
quiche_windows (i686-pc-windows-gnu)	6m 59s
quiche_windows (x86_64-pc-windows-msvc)	5m 45s
android_ndk_lts (aarch64-linux-android)	1m 43s
	1h 14m 51s

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