manifest: sdk-zephyr: Pull GARP TX support

Sends GARP periodically to help maintain ARP cache in the network.

Signed-off-by: Chaitanya Tata <[email protected]>

Author: krish2718

west.yml

@@ -61,7 +61,7 @@ manifest:
     # https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/zephyr/guides/modules.html
     - name: zephyr
       repo-path: sdk-zephyr
-      revision: v3.5.99-ncs1-4
+      revision: pull/2748/head
       import:
         # In addition to the zephyr repository itself, NCS also
         # imports the contents of zephyr/west.yml at the above