west.yml: Update west to point to the recent changes for hal_stm32

Update west.yml to point to the recent changes for hal_stm32.

Signed-off-by: Ali Hozhabri <[email protected]>

Author: HoZHel

west.yml

@@ -246,7 +246,7 @@ manifest:
         - hal
     - name: hal_stm32
       revision: 126cbbee19208b7aaca5ad8b287cf104e8bc837a
-      path: modules/hal/stm32
+      path: pull/303/head
       groups:
         - hal
     - name: hal_tdk