Fix broken GitHub links for `fine_tune_bert.ipynb`

Since this has moved repo, the links are 404ing. The GCS link is still referring to the old file but it's the only `fine_tune_bert.ipynb` in that bucket.

PiperOrigin-RevId: 457621873

docs/nlp/fine_tune_bert.ipynb

@@ -51,10 +51,10 @@
         "    \u003ca target=\"_blank\" href=\"https://www.tensorflow.org/tfmodels/nlp/fine_tune_bert\"\u003e\u003cimg src=\"https://www.tensorflow.org/images/tf_logo_32px.png\" /\u003eView on TensorFlow.org\u003c/a\u003e\n",
         "  \u003c/td\u003e\n",
         "  \u003ctd\u003e\n",
-        "    \u003ca target=\"_blank\" href=\"https://colab.research.google.com/github/tensorflow/text/blob/master/docs/tutorials/fine_tune_bert.ipynb\"\u003e\u003cimg src=\"https://www.tensorflow.org/images/colab_logo_32px.png\" /\u003eRun in Google Colab\u003c/a\u003e\n",
+        "    \u003ca target=\"_blank\" href=\"https://colab.research.google.com/github/tensorflow/models/blob/master/docs/nlp/fine_tune_bert.ipynb\"\u003e\u003cimg src=\"https://www.tensorflow.org/images/colab_logo_32px.png\" /\u003eRun in Google Colab\u003c/a\u003e\n",
         "  \u003c/td\u003e\n",
         "  \u003ctd\u003e\n",
-        "    \u003ca target=\"_blank\" href=\"https://github.com/tensorflow/text/blob/master/docs/tutorials/fine_tune_bert.ipynb\"\u003e\u003cimg src=\"https://www.tensorflow.org/images/GitHub-Mark-32px.png\" /\u003eView source on GitHub\u003c/a\u003e\n",
+        "    \u003ca target=\"_blank\" href=\"https://github.com/tensorflow/models/blob/master/docs/nlp/fine_tune_bert.ipynb\"\u003e\u003cimg src=\"https://www.tensorflow.org/images/GitHub-Mark-32px.png\" /\u003eView source on GitHub\u003c/a\u003e\n",
         "  \u003c/td\u003e\n",
         "  \u003ctd\u003e\n",
         "    \u003ca href=\"https://storage.googleapis.com/tensorflow_docs/text/docs/tutorials/fine_tune_bert.ipynb\"\u003e\u003cimg src=\"https://www.tensorflow.org/images/download_logo_32px.png\" /\u003eDownload notebook\u003c/a\u003e\n",