Bump nix from 0.26.2 to 0.27.1 #2607

Job	Run time
Format	29s
Deny (advisories)	40s
Deny (bans licenses sources)	41s
Clippy	1m 25s
Check (stable)	1m 25s
Check (1.65.0)	1m 24s
Cross (aarch64-linux-android)	1m 23s
Cross (aarch64-unknown-linux-gnu)	1m 25s
Cross (aarch64-unknown-linux-musl)	1m 24s
Documentation	1m 25s
Hack	1m 37s
Lint markdown files	57s
Tests	1m 36s
Tools	1m 36s
	17m 27s

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