nixos/wireless: fix indentation of extraConfig (#377482)

Changed files
+1 -1
nixos
modules
services
networking
+1 -1
nixos/modules/services/networking/wpa_supplicant.nix
···
++ optional (pskString != null) "psk=${pskString}"
++ optionals (opts.auth != null) (filter (x: x != "") (splitString "\n" opts.auth))
++ optional (opts.priority != null) "priority=${toString opts.priority}"
-
++ optional (opts.extraConfig != "") opts.extraConfig;
+
++ filter (x: x != "") (splitString "\n" opts.extraConfig);
in
''
network={