[nrf fromtree] manifest: Update nrf_wifi revision to fix raw tx

Fix TX buffer issue for raw tx.

Signed-off-by: Kapil Bhatt <[email protected]>
(cherry picked from commit 028eec2)

Author: kapbh

west.yml

@@ -328,7 +328,7 @@ manifest:
       revision: 40403f5f2805cca210d2a47c8717d89c4e816cda
       path: modules/bsim_hw_models/nrf_hw_models
     - name: nrf_wifi
-      revision: 787eea1a3c8dd13c86214e204a919e6f9bcebf91
+      revision: 5fffeab6496932abb10f9dae53ed3686967aa050
       path: modules/lib/nrf_wifi
     - name: open-amp
       revision: f7f4d083c7909a39d86e217376c69b416ec4faf3