fix(nvidia-bootc): Use INSTRUCTLAB_IMAGE_PULL_SECRET in podman pull command

Signed-off-by: Matthieu Bernardin <[email protected]>

Author: pastequo

training/nvidia-bootc/Containerfile

@@ -209,7 +209,7 @@ RUN --mount=type=secret,id=instructlab-nvidia-pull/.dockerconfigjson \
          IID=$(podman --root /usr/lib/containers/storage pull oci:/run/.input/instructlab-nvidia) && \
          podman --root /usr/lib/containers/storage image tag ${IID} ${INSTRUCTLAB_IMAGE}; \
     elif [ -f "/run/secrets/${INSTRUCTLAB_IMAGE_PULL_SECRET}/.dockerconfigjson" ]; then \
-         IID=$(sudo podman --root /usr/lib/containers/storage pull --authfile /run/secrets/instructlab-nvidia-pull/.dockerconfigjson ${INSTRUCTLAB_IMAGE}); \
+         IID=$(sudo podman --root /usr/lib/containers/storage pull --authfile /run/secrets/${INSTRUCTLAB_IMAGE_PULL_SECRET}/.dockerconfigjson ${INSTRUCTLAB_IMAGE}); \
     else \
          IID=$(sudo podman --root /usr/lib/containers/storage pull ${INSTRUCTLAB_IMAGE}); \
     fi