change version from dev to 2.0Beta (#899)

* change version from dev to 2.0Beta

* change version

paddle2.0_docs/save_model/save_model.ipynb

@@ -14,19 +14,19 @@
    "metadata": {},
    "source": [
     "## 环境\n",
-    "本教程基于paddle-develop编写，如果您的环境不是本版本，请先安装paddle-develop版本。"
+    "本教程基于paddle-2.0Beta编写，如果您的环境不是此版本，请先安装paddle-2.0Beta版本，使用命令：pip3 install paddlepaddle==2.0Beta。"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": 9,
+   "execution_count": 1,
    "metadata": {},
    "outputs": [
     {
      "name": "stdout",
      "output_type": "stream",
      "text": [
-      "0.0.0\n"
+      "2.0.0-beta0\n"
      ]
     }
    ],