change imports

Author: dishaprakash

samples/langchain_quick_start.ipynb

@@ -602,7 +602,7 @@
    "outputs": [],
    "source": [
     "from langchain_google_alloydb_pg import AlloyDBEngine, AlloyDBLoader\n",
-    "from langchain_postgres.v2 import Column\n",
+    "from langchain_postgres import Column\n",
     "\n",
     "engine = AlloyDBEngine.from_instance(\n",
     "    project_id=project_id,\n",