west.yml: update hal_stm32 revision for LL 802.15.4 lib url fix

Update hal_stm32 revision to fix url vulnerability of link layer
802.15.4 libraries for stm32wba.

Signed-off-by: Vincent Tardy <[email protected]>

Author: vtardy-st

west.yml

@@ -250,7 +250,7 @@ manifest:
       groups:
         - hal
     - name: hal_stm32
-      revision: 55e159704b02ec4e7b4f0a88735044bee92c25c2
+      revision: pull/324/head
       path: modules/hal/stm32
       groups:
         - hal