fix: typo in .devcontainer/README.md from "./container/build.sh --target dev" to "./container/build.sh --target local-dev"

Signed-off-by: Lin Yiming <[email protected]>

Author: lynnmatrix

.devcontainer/README.md

@@ -94,7 +94,7 @@ Follow these steps to get your NVIDIA Dynamo development environment up and runn
 Build `dynamo:latest-vllm` from scratch from the source:
 
 ```bash
-./container/build.sh --target dev --framework VLLM
+./container/build.sh --target local-dev --framework VLLM
 ```
 
 The container will be built and give certain file permissions to your local uid and gid.