manifest: Update hal_silabs

Update hal_silabs to include null pointer fix for wiseconnect.

Signed-off-by: Aksel Skauge Mellbye <[email protected]>
Upstream-status: pending

Author: asmellby

west.yml

@@ -240,7 +240,7 @@ manifest:
       groups:
         - hal
     - name: hal_silabs
-      revision: 091a5bbd2f83b83d4f00f166c6781b19bee0d03d
+      revision: 280aa3b95404bc804fa331ad402a56c0e737cea7
       path: modules/hal/silabs
       groups:
         - hal