apps: clippy fixup #5269

Job	Run time
quiche_macos (macos-13)	3m 41s
quiche	3m 31s
quiche_macos (macos-latest)	1m 44s
quiche (boringssl-boring-crate)	3m 15s
quiche (openssl)	5m 55s
android_ndk_lts (aarch64-linux-android)	1m 6s
docker	3m 18s
android_ndk_lts (armv7-linux-androideabi)	1m 14s
android_ndk_lts (x86_64-linux-android)	1m 1s
http3_test	53s
android_ndk_lts (i686-linux-android)	1m 3s
nginx (1.16.1)	54s
quiche_ios (x86_64-apple-ios)	1m 21s
quiche_multiarch (aarch64-unknown-linux-gnu)	2m 53s
quiche_ios (aarch64-apple-ios)	1m 20s
quiche_windows (x86_64-pc-windows-msvc)	2m 42s
quiche_multiarch (armv7-unknown-linux-gnueabihf)	3m 3s
quiche_windows (i686-pc-windows-msvc)	4m 38s
quiche_multiarch (i686-unknown-linux-gnu)	1m 44s
quiche_windows (x86_64-pc-windows-gnu)	5m 14s
quiche_windows (i686-pc-windows-gnu)	5m 35s
	56m 5s

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