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

Automatically created by Github Action

Signed-off-by: Nordic Builder <pylon@nordicsemi.no>

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: fbc220f29bdeb98b68fa83426fa936ceb6e6ffd9
+      revision: pull/2638/head
       import:
         # In addition to the zephyr repository itself, NCS also
         # imports the contents of zephyr/west.yml at the above