clarified NPU error under investigation

Author: samuel100

articles/ai-foundry/foundry-local/reference/reference-best-practice.md

@@ -45,7 +45,7 @@ Foundry Local is designed for on-device inference and *not* distributed, contain
 | Slow inference | CPU-only model with large parameter count | Use GPU-optimized model variants when available |
 | Model download failures | Network connectivity issues | Check your internet connection and run `foundry cache list` to verify cache status |
 | The service fails to start | Port conflicts or permission issues | Try `foundry service restart` or [report an issue](https://github.com/microsoft/Foundry-Local/issues) with logs using `foundry zip-logs` |
-| Qualcomm NPU error (`Qnn error code 5005: "Failed to load from EpContext model. qnn_backend_manager."`) | Qualcomm NPU error | |
+| Qualcomm NPU error (`Qnn error code 5005: "Failed to load from EpContext model. qnn_backend_manager."`) | Qualcomm NPU error | Under investigation |
 
 ### Improving performance