chore(deps): update cachix/install-nix-action action to v25 #593

Job	Run time
nix (aarch64, fmt -- --check)	9m 50s
nix (aarch64, eval .#apps.$_system.nixos-shell.program)	11m 24s
nix (aarch64, eval .#apps.$_system.setup.program)	10m 21s
nix (x86_64, fmt -- --check)	3m 8s
nix (x86_64, eval .#apps.$_system.nixos-shell.program)	4m 12s
nix (x86_64, eval .#apps.$_system.setup.program)	3m 20s
nix (develop .#jdk8 --profile profile, x86_64)	3m 36s
nix (develop .#jdk11 --profile profile, x86_64)	3m 14s
nix (develop .#jdk17 --profile profile, x86_64)	4m 20s
nix (develop .#php74 --profile profile, x86_64)	2m 59s
nix (develop .#php74-composer1 --profile profile, x86_64)	3m 46s
nix (develop .#php80 --profile profile, x86_64)	3m 12s
nix (develop .#php81 --profile profile, x86_64)	3m 21s
nix (build .#homeConfigurations."tobias@gamer".activationPackage, x86_64)	15m 42s
nix (build .#nixOnDroidConfigurations.pixel7a.activationPackage --impure, aarch64)	21m 11s
nix (build .#nixosConfigurations.argon.config.system.build.toplevel, aarch64, argon)	21m 1s
nix (build .#nixosConfigurations.krypton.config.system.build.toplevel, x86_64, krypton)	8m 53s
nix (build .#nixosConfigurations.neon.config.system.build.toplevel, x86_64, neon, --async)	15m 35s
nix (build .#nixosConfigurations.xenon.config.system.build.toplevel, aarch64, xenon)	21m 33s
nix (build .#packages.$_system.rpi-firmware, aarch64)	8m 37s
nix (build .#packages.$_system.rpi-image, aarch64)	21m 32s
nix (build .#packages.$_system.installer-image, x86_64)	6m 4s
	3h 26m 51s

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