west.yml: update Zephyr to include 9ce6d3599c32

Update Zephyr to include a fix for LLEXT user-space builds.

Signed-off-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>

Author: lyakh

west.yml

@@ -43,7 +43,7 @@ manifest:
 
     - name: zephyr
       repo-path: zephyr
-      revision: c99605126cd9cce5684ddd9ad56aed5292004867
+      revision: bfdab166e3d4d00603eddc08c3368b3bbbe655dd
       remote: zephyrproject
 
       # Import some projects listed in zephyr/west.yml@revision