bluetooth: samples: Add nrf54l15dk/nrf54l05 to RAS requestor sample

Building this sample for this target does work, but the docs were not
updated.

Signed-off-by: Olivier Lesage <[email protected]>

Author: olivier-le-sage

samples/bluetooth/channel_sounding_ras_initiator/sample.yaml

@@ -7,9 +7,11 @@ tests:
     sysbuild: true
     build_only: true
     integration_platforms:
+      - nrf54l15dk/nrf54l05/cpuapp
       - nrf54l15dk/nrf54l10/cpuapp
       - nrf54l15dk/nrf54l15/cpuapp
     platform_allow:
+      - nrf54l15dk/nrf54l05/cpuapp
       - nrf54l15dk/nrf54l10/cpuapp
       - nrf54l15dk/nrf54l15/cpuapp
     tags: