ci: build against the AIROC softAP fixes in the zephyr fork

CI-only, as before (#12): the softAP work in #22 needs
drivers/wifi/infineon/airoc_wifi.c from tyeth/zephyr branch airoc-softap-fixes,
which sits on top of cyw43-shared-bus-ble. Point the override at it.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

Author: tyeth

ports/zephyr-cp/zephyr-config/west.yml

@@ -30,7 +30,7 @@ manifest:
     #   hal_infineon  as imported by Zephyr's own manifest
     - name: zephyr
       url: https://github.com/tyeth/zephyr
-      revision: cyw43-shared-bus-ble
+      revision: airoc-softap-fixes
       clone-depth: 100
       import:
         # Skip what no CircuitPython board can use, so west update fetches 37