Update the vLLM external router container

vllm/vllm-router only retains ~16 recent nightlies on Docker Hub; older
dated tags are garbage-collected (manifest unknown), which makes `docker run`
fail with exit 125 on any node that has not already cached the image.

Author: chunfangamd

benchmarks/multi_node/amd_utils/job.slurm

@@ -315,8 +315,10 @@ export IS_MULTINODE="${IS_MULTINODE:-false}"
 SANITIZED_USER=$(echo "$USER_NAME" | tr -c 'a-zA-Z0-9_.-' '_')
 export DOCKER_CONT_NAME="container_${ENGINE}_${SANITIZED_USER}_${MODEL_NAME}_${SLURM_JOB_ID}"
 
-# vLLM external router container
-VLLM_ROUTER_IMAGE="${VLLM_ROUTER_IMAGE:-vllm/vllm-router:nightly-20260603-e667ebb}"
+# vLLM external router container.
+# NOTE: vllm/vllm-router only retains ~16 recent nightlies on Docker Hub; older
+# dated tags are garbage-collected (manifest unknown)
+VLLM_ROUTER_IMAGE="${VLLM_ROUTER_IMAGE:-vllm/vllm-router:nightly-20260617-e667ebb}"
 ROUTER_CONT_NAME="router_vllm_${SANITIZED_USER}_${SLURM_JOB_ID}"
 export RUN_FILE_FULL="$WS_PATH/${RUN_FILE}"