manifest: update sdk-nrf-802154

Temporary update to test CI.

Signed-off-by: Marcin Szymczyk <marcin.szymczyk@nordicsemi.no>

Author: masz-nordic

west.yml

@@ -174,7 +174,7 @@ manifest:
     - name: nrf-802154
       repo-path: sdk-nrf-802154
       path: nrf-802154
-      revision: 00422af73e817b5a0a75cb34ceed5de1193091ed
+      revision: pull/647/head
       groups:
         - nrf-802154
     - name: dragoon