doc: release-notes: add passive scan support release notes

Added Wi-Fi passive scan support related info.

Signed-off-by: Ajay Parida <[email protected]>

Author: ajayparida

doc/releases/release-notes-3.5.rst

@@ -223,6 +223,10 @@ Trusted Firmware-M
 Networking
 **********
 
+* Wi-Fi
+  * Added Passive scan support.
+  * The Wi-Fi scan API updated with Wi-Fi scan parameter to allow scan mode selection.
+
 USB
 ***