samples: wifi: provisioning: ble: Fix scan issue

Increase CTRL heap to fix scan issue.

Fixes SHEL-3570.

Signed-off-by: Triveni Danda <[email protected]>
(cherry picked from commit 9b5ecc4)

Author: D-Triveni

samples/wifi/provisioning/ble/sample.yaml

@@ -62,6 +62,7 @@ tests:
     extra_args:
       - ble_SHIELD="nrf7002eb2"
       - ble_SNIPPET=nrf70-wifi
+      - CONFIG_NRF_WIFI_CTRL_HEAP_SIZE=25000
     integration_platforms:
       - nrf54l15dk/nrf54l15/cpuapp
     platform_allow: