upgrade nix to 0.27 (#10223)

This fixes a segfault on Android when fetching the user group.

See: https://github.com/nix-rust/nix/issues/2084

crates/nu-command/Cargo.toml

@@ -100,7 +100,7 @@ winreg = "0.50"
 [target.'cfg(unix)'.dependencies]
 libc = "0.2"
 umask = "2.1"
-nix = { version = "0.26", default-features = false, features = ["user"] }
+nix = { version = "0.27", default-features = false, features = ["user"] }
 
 [target.'cfg(not(any(target_os = "android", target_os = "ios")))'.dependencies.trash]
 optional = true