Prepare release `2.6.0-rc.1` #95

Job	Run time
check / test linux x86-64	24m 5s
check / test macos aarch64	13m 22s
release / build x86_64-unknown-linux-gnu	13m 33s
check / test windows x86-64	26m 19s
release / build x86_64-unknown-linux-musl	13m 24s
release / build aarch64-unknown-linux-gnu	14m 13s
release / build aarch64-unknown-linux-musl	14m 5s
release / build x86_64-apple-darwin	31m 26s
release / build aarch64-apple-darwin	18m 29s
release / build x86_64-pc-windows-msvc	24m 38s
release / verify ubuntu-20.04 x86_64-unknown-linux-gnu	22s
release / checksums	5s
release / verify ubuntu-22.04 x86_64-unknown-linux-gnu	29s
release / verify macos-14 aarch64-apple-darwin	40s
release / verify windows-2019 x86_64-pc-windows-msvc	2m 30s
draft release	8s
	3h 17m 48s

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