manifest: update zephyr to bring in nrf21540 timing fix

This commit brings in zephyr containing the fix of
tx-en-settle-time-us default value for the nrf21540 Front-End Module.

Signed-off-by: Andrzej Kuros <[email protected]>

Author: ankuns

west.yml

@@ -65,7 +65,7 @@ manifest:
     # https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/zephyr/guides/modules.html
     - name: zephyr
       repo-path: sdk-zephyr
-      revision: 464150f23f1f19d427145cb8e3d2a47f4d15de11
+      revision: 893c3332454a29c1611fa90aa8ceaf87a6bdf848
       import:
         # In addition to the zephyr repository itself, NCS also
         # imports the contents of zephyr/west.yml at the above