fix(compose): request NVIDIA compute capability (#11990)

The legacy NVIDIA device reservation requests utility without compute.
Docker derives driver capabilities from that list, leaving CUDA libraries
unavailable even when monitoring works.

Include compute in the legacy example and clarify the matching docs.

Assisted-by: Codex:GPT-6

Co-authored-by: localai-org-maint-bot <306269227+localai-org-maint-bot@users.noreply.github.com>

docs/content/reference/nvidia-l4t.md

@@ -88,8 +88,10 @@ page in the frontend shows the node as fully used, check two things:
    NVML work inside the container. With `--gpus all` alone (or
    `--runtime nvidia` without extra flags) only `compute` is wired in on
    some driver versions. Add `-e NVIDIA_DRIVER_CAPABILITIES=compute,utility`
-   to your `docker run`, or `capabilities: [gpu, utility]` in compose /
-   Kubernetes device reservations.
+   to your `docker run`. For Docker Compose with `driver: nvidia`, use
+   `capabilities: [gpu, compute, utility]` on the device reservation.
+   Include `compute` for CUDA libraries such as `libcuda.so.1`; `utility`
+   alone only provides monitoring libraries and tools.
 2. Pass `--init` to `docker run` (or `init: true` in compose) so the
    container has a proper PID 1 reaper - otherwise short-lived child
    processes like `nvidia-smi` can intermittently fail with