test_spec: Run Bluetooth tests on nrf_security changes

The test coverage for nrf_security plans does not cover
basic functionality used by Bluetooth.

#21266 broke
Bluetooth. Therefore we now extend the test scope
to prevent this from happening again.

Signed-off-by: Rubin Gerritsen <[email protected]>

Author: rugeGerritsen

.github/test-spec.yml

@@ -214,6 +214,7 @@
       - "!include/bluetooth/mesh/**/*"
   - "subsys/nrf_rpc/**/*"
   - "subsys/mpsl/**/*"
+  - "subsys/nrf_security/**/*"
   - "drivers/mpsl/**/*"
 
 "CI-ble-samples-test":