supplicant: Fix tiny typo in the documentation

Changed files
+1 -1
nixos
modules
services
networking
+1 -1
nixos/modules/services/networking/supplicant.nix
···
example = literalExample ''
{ "wlan0 wlan1" = {
-
configFile = "/etc/wpa_supplicant";
+
configFile.path = "/etc/wpa_supplicant.conf";
userControlled.group = "network";
extraConf = '''
ap_scan=1