fix notebook test

Author: sycai

notebooks/generative_ai/bq_dataframes_ai_forecast.ipynb

@@ -69,7 +69,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "PROJECT = \"{YOUR_PROJECT}\" # replace with your project\n",
+    "PROJECT = \"bigframes-dev\" # replace with your project\n",
     "\n",
     "import bigframes.pandas as bpd\n",
     "bpd.options.bigquery.project = PROJECT\n",