Update tutorial_transformer.ipynb

docs/tutorial/asr/tutorial_transformer.ipynb

@@ -138,7 +138,7 @@
    },
    "outputs": [],
    "source": [
-    "!pip install --upgrade pip && pip install paddlespeech"
+    "!pip install --upgrade pip && pip install paddlespeech==0.1.0"
    ]
   },
   {