Bump cargo-dist version to 0.28.0 #939

Job	Run time
sdist	9m 56s
macos-x86_64	10m 52s
macos-aarch64	11m 25s
linux (x86_64-unknown-linux-gnu)	8m 4s
linux-arm (aarch64-unknown-linux-gnu, aarch64, -e JEMALLOC_SYS_WITH_LG_PAGE=16)	11m 35s
linux (i686-unknown-linux-gnu)	11m 18s
windows (x86_64-pc-windows-msvc, x64)	15m 27s
linux-arm (armv7-unknown-linux-gnueabihf, armv7)	10m 36s
windows (i686-pc-windows-msvc, x86)	16m 17s
linux-arm (arm-unknown-linux-musleabihf, arm)	10m 39s
linux-powerpc (powerpc64le-unknown-linux-gnu, ppc64le, -e JEMALLOC_SYS_WITH_LG_PAGE=16)	11m 28s
linux-powerpc (powerpc64-unknown-linux-gnu, ppc64, -e JEMALLOC_SYS_WITH_LG_PAGE=16)	11m 23s
linux-s390x (s390x-unknown-linux-gnu, s390x)	13m 52s
musllinux (x86_64-unknown-linux-musl)	11m 0s
musllinux (i686-unknown-linux-musl)	10m 5s
musllinux-cross (aarch64-unknown-linux-musl, aarch64, -e JEMALLOC_SYS_WITH_LG_PAGE=16)	11m 24s
musllinux-cross (armv7-unknown-linux-musleabihf, armv7)	10m 49s
	3h 16m 10s

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