manifest: Update sdk-zephyr revision (auto-manifest PR)

Automatically created by Github Action

Signed-off-by: Nordic Builder <[email protected]>

Author: NordicBuilder

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: v4.0.99-ncs1
+      revision: 256ac2a4434ea1664497ba5d9b95bc2f4bff6e66
       import:
         # In addition to the zephyr repository itself, NCS also
         # imports the contents of zephyr/west.yml at the above