west: Point back to main after 3.3.0 release

This commit updates the example-application to point back to the Zephyr
main branch after the Zephyr v3.3.0 release.

Signed-off-by: Stephanos Ioannidis <[email protected]>

Author: stephanosio

west.yml

@@ -12,5 +12,5 @@ manifest:
   projects:
     - name: zephyr
       remote: zephyrproject-rtos
-      revision: v3.3.0
+      revision: main
       import: true