vendor: track tower-http in important upstream checks #73

Job	Run time
build-linux-host-simd	10m 36s
build (aarch64-unknown-linux-gnu, ubuntu-latest)	4m 16s
build (x86_64-unknown-linux-gnu, ubuntu-latest)	3m 33s
build (aarch64-apple-darwin, macos-latest)	5m 48s
build (x86_64-apple-darwin, macos-latest)	4m 55s
release	12s
	29m 20s

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