doc: net: Add an entry for Wi-Fi Management

This was missing all along.

Signed-off-by: Chaitanya Tata <Chaitanya.Tata@nordicsemi.no>

doc/connectivity/networking/overview.rst

@@ -99,12 +99,16 @@ can be disabled if not needed.
   listen management events generated by core stack when for example IP address
   is added to the device, or network interface is coming up etc.
 
+* **Wi-Fi Management API.** Applications can use Wi-Fi management API to
+  manage the interface, in example to connect to Wi-Fi network and to scan
+  available Wi-Fi networks.
+
 * **Multiple Network Technologies.** The Zephyr OS can be configured to
   support multiple network technologies at the same time simply by enabling
-  them in Kconfig: for example, Ethernet and 802.15.4 support. Note that no
-  automatic IP routing functionality is provided between these technologies.
-  Applications can send data according to their needs to desired network
-  interface.
+  them in Kconfig: for example, Ethernet, Wi-Fi and 802.15.4 support. Note
+  that no automatic IP routing functionality is provided between these
+  technologies. Applications can send data according to their needs to desired
+  network interface.
 
 * **Minimal Copy Network Buffer Management.** It is possible to have minimal
   copy network data path. This means that the system tries to avoid copying