fix: [DYN-2335] correct docker tag for tritonserver build (#7037)

Signed-off-by: Neal Vaidya <nealv@nvidia.com>

examples/backends/tritonserver/Dockerfile

 # SPDX-FileCopyrightText: Copyright (c) 2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
 # SPDX-License-Identifier: Apache-2.0
 
-ARG DYNAMO_BASE_IMAGE="dynamo:latest-none"
+ARG DYNAMO_BASE_IMAGE="dynamo-base:latest"
 ARG TRITON_SERVER_IMAGE="nvcr.io/nvidia/tritonserver:25.01-py3"
 
 FROM ${TRITON_SERVER_IMAGE} AS triton_source

examples/backends/tritonserver/README.md

@@ -40,7 +40,7 @@ From the Dynamo repository root:
 ```bash
 # Build the base Dynamo image
 python container/render.py --framework=dynamo --target=runtime --output-short-filename
-docker build -f container/rendered.Dockerfile .
+docker build -f container/rendered.Dockerfile -t dynamo-base:latest .
 
 # Build the Triton worker image
 cd examples/backends/tritonserver