Prepare release `2.6.3` #99

Job	Run time
check / test linux x86-64	31m 40s
check / test macos aarch64	16m 45s
release / build x86_64-unknown-linux-gnu	13m 9s
check / test windows x86-64	32m 20s
release / build x86_64-unknown-linux-musl	13m 59s
release / build aarch64-unknown-linux-gnu	14m 19s
release / build aarch64-unknown-linux-musl	14m 4s
release / build x86_64-apple-darwin	36m 44s
release / build aarch64-apple-darwin	14m 32s
release / build x86_64-pc-windows-msvc	24m 20s
release / checksums	5s
release / verify ubuntu-20.04 x86_64-unknown-linux-gnu	25s
release / verify ubuntu-22.04 x86_64-unknown-linux-gnu	22s
release / verify macos-14 aarch64-apple-darwin	30s
release / verify windows-2019 x86_64-pc-windows-msvc	1m 14s
draft release	10s
	3h 34m 38s

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