docs(cli): link deploy quickstart

Co-authored-by: open-swe[bot] <open-swe@users.noreply.github.com>

libs/cli/langgraph_cli/deploy.py

@@ -1607,7 +1607,7 @@ def _deploy_cmd(
         message = (
             "We couldn't find a langgraph.json file. Run `langgraph deploy` from "
             "the root of a LangSmith Deployment project. To get started, visit "
-            "https://docs.langchain.com/langsmith/application-structure."
+            "https://docs.langchain.com/langsmith/deployment-quickstart."
         )
         if json_output:
             em.error(message)

libs/cli/tests/unit_tests/cli/test_cli.py

@@ -329,7 +329,7 @@ def test_deploy_missing_config_shows_actionable_error(tmp_path, monkeypatch) ->
     assert result.exit_code == 1
     assert "We couldn't find a langgraph.json file." in result.output
     assert "Run `langgraph deploy` from the root" in result.output
-    assert "https://docs.langchain.com/langsmith/application-structure" in result.output
+    assert "https://docs.langchain.com/langsmith/deployment-quickstart" in result.output
     assert "Traceback" not in result.output