http_file_server : fix kconfig of example

examples/protocols/http_server/file_serving/main/Kconfig.projbuild

@@ -1,16 +1,16 @@
 menu "Example Configuration"
 
-config WIFI_SSID
-    string "WiFi SSID"
-    default "myssid"
-    help
-        SSID (network name) for the example to connect to.
+    config WIFI_SSID
+        string "WiFi SSID"
+        default "myssid"
+        help
+            SSID (network name) for the example to connect to.
 
-config WIFI_PASSWORD
-    string "WiFi Password"
-    default "mypassword"
-    help
-        WiFi password (WPA or WPA2) for the example to use.
-        Can be left blank if the network has no security set.
+    config WIFI_PASSWORD
+        string "WiFi Password"
+        default "mypassword"
+        help
+            WiFi password (WPA or WPA2) for the example to use.
+            Can be left blank if the network has no security set.
 
 endmenu