fix: Update import path for _FastText in fineweb-edu-ensemble-classification notebook (#748)

Signed-off-by: Abhinav Garg <abhinavg@stanford.edu>

Author: abhinavg4

tutorials/distributed_data_classification/fineweb-edu-ensemble-classification.ipynb

@@ -72,7 +72,7 @@
     "import fasttext\n",
     "import numpy as np\n",
     "import pandas as pd\n",
-    "from fasttext import _FastText\n",
+    "from fasttext.FastText import _FastText\n",
     "from huggingface_hub import hf_hub_download\n",
     "\n",
     "from nemo_curator import get_client\n",