Correct Kconfigs according to the coding style

* Original commit: espressif/esp-idf@37126d3451

examples/protocols/asio/chat_server/main/Kconfig.projbuild

@@ -1,21 +1,21 @@
 menu "Example Configuration"
 
-config ESP_WIFI_SSID
-    string "WiFi SSID"
-    default "myssid"
-    help
-	SSID (network name) for the example to connect to.
+    config ESP_WIFI_SSID
+        string "WiFi SSID"
+        default "myssid"
+        help
+            SSID (network name) for the example to connect to.
 
-config ESP_WIFI_PASSWORD
-    string "WiFi Password"
-    default "mypassword"
-    help
-	WiFi password (WPA or WPA2) for the example to use.
+    config ESP_WIFI_PASSWORD
+        string "WiFi Password"
+        default "mypassword"
+        help
+            WiFi password (WPA or WPA2) for the example to use.
 
-config EXAMPLE_PORT
-    string "asio example port number"
-    default "80"
-    help
-    Port number used by ASIO example
+    config EXAMPLE_PORT
+        string "asio example port number"
+        default "80"
+        help
+            Port number used by ASIO example
 
 endmenu