manifest: update hal_nordic revision

Updates hal_nordic revision to fix spurious USBPWRRDY events.

Signed-off-by: Johann Fischer <johann.fischer@nordicsemi.no>
diff --git a/west.yml b/west.yml
index a2afb36..d59033c 100644
--- a/west.yml
+++ b/west.yml
@@ -88,7 +88,7 @@
       groups:
         - hal
     - name: hal_nordic
-      revision: a6e5299041f152da5ae0ab17b2e44e088bb96d6d
+      revision: cad21db72a61b8dde0aabf95301dfd9dee119018
       path: modules/hal/nordic
       groups:
         - hal