manifest: update hal_stm32 revision to integrate ethernet on stm32mp13

New hal_stm32 revision contains pincontrol for the etherent support.

Signed-off-by: Arnaud Pouliquen <[email protected]>

Author: arnopo

west.yml

@@ -250,7 +250,7 @@ manifest:
       groups:
         - hal
     - name: hal_stm32
-      revision: 2459cda20429a15d4a5eb5ca4140a0c19618f3bf
+      revision: refs/pull/287/head
       path: modules/hal/stm32
       groups:
         - hal