manifest: Update zephyr head

Pull in fixes for SAADC in ncs-3.1 release.

Signed-off-by: Jakub Zymelka <[email protected]>

Author: jaz1-nordic

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: ncs-v3.1.0-rc2
+      revision: af5694bc2f07abe7d42c021176314fa7aa6f2dc6
       import:
         # In addition to the zephyr repository itself, NCS also
         # imports the contents of zephyr/west.yml at the above