fix: MODEL_EMBEDDING_API_BASE

Author: zakahan

veadk_tutorial.ipynb

@@ -822,7 +822,7 @@
     "# 设置访问火山方舟的 Embedding 模型\n",
     "os.environ[\"MODEL_EMBEDDING_NAME\"] = \"doubao-embedding-text-240715\"\n",
     "os.environ[\"MODEL_EMBEDDING_API_BASE\"] = (\n",
-    "    \"https://ark.cn-beijing.volces.com/api/v3/embeddings\"\n",
+    "    \"https://ark.cn-beijing.volces.com/api/v3/\"\n",
     ")\n",
     "os.environ[\"MODEL_EMBEDDING_DIM\"] = \"2560\"\n",
     "os.environ[\"MODEL_EMBEDDING_API_KEY\"] = \"\""