fix(recipes): correct PATH in dsv4-sglang Dockerfile (#8713)

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

recipes/deepseek-v4-flash/sglang/Dockerfile.dsv4-sglang

@@ -50,7 +50,7 @@ ENV DEBIAN_FRONTEND=noninteractive
 # Infra from dynamo sglang-runtime (etcd, nats, UCX, NIXL)
 COPY --from=dynamo_src /usr/bin/nats-server /usr/bin/nats-server
 COPY --from=dynamo_src /usr/local/bin/etcd /usr/local/bin/etcd
-ENV PATH=/usr/local/bin/etcd:${PATH}
+ENV PATH=/usr/local/bin:${PATH}
 
 # UCX libs
 COPY --from=dynamo_src /usr/lib/x86_64-linux-gnu/ucx /usr/lib/x86_64-linux-gnu/ucx