west.yml: fix build warnings in hal_st module

Fix hal_st module that broke CI.

Signed-off-by: Armando Visconti <[email protected]>

Author: avisconti

west.yml

@@ -245,7 +245,7 @@ manifest:
       groups:
         - hal
     - name: hal_st
-      revision: 6d03b42859c2f8cedd6872da20b1dbdbef5c2392
+      revision: pull/29/head
       path: modules/hal/st
       groups:
         - hal