west: Pin the Zephyr release to v3.2.0

Align with Zephyr relase v3.2.0.

Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>

Author: fabiobaltieri

west.yml

@@ -13,5 +13,5 @@ manifest:
   projects:
     - name: zephyr
       remote: zephyrproject-rtos
-      revision: main
+      revision: v3.2.0
       import: true