manifest: update sdk-zephyr

Include
tests: drivers: clock_control: Run tests on nrf54l20pdk
nrfconnect/sdk-zephyr#2406
TBU

Signed-off-by: Sebastian Głąb <[email protected]>

Author: nordic-segl

west.yml

@@ -69,7 +69,7 @@ manifest:
     # https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/zephyr/guides/modules.html
     - name: zephyr
       repo-path: sdk-zephyr
-      revision: 7c3bd68895d63ae72906cfd2722a482209a12272
+      revision: pull/2406/head
       import:
         # In addition to the zephyr repository itself, NCS also
         # imports the contents of zephyr/west.yml at the above