tools: update nixpkgs-unstable to b3da656039dc7a6240f27b2ef8cc6a3ef3b #6610

Job	Run time
Build slim tarball	1m 16s
aarch64-linux: Cache V8 build	24s
x86_64-darwin: with shared libraries	37m 40s
aarch64-darwin: with shared libraries	24m 25s
x86_64-linux: with shared libraries	24m 32s
aarch64-linux: with shared openssl-3.0.19	22m 44s
aarch64-linux: with shared openssl-1.1.1w	21m 52s
aarch64-linux: with shared openssl-3.6.1	21m 58s
aarch64-linux: with shared openssl-4.0.0	22m 16s
aarch64-linux: with shared openssl-3.5.5	22m 44s
aarch64-linux: with shared boringssl-0.20260413.0	22m 11s
	3h 42m 2s

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