Fix model and data URLs in annotation tutorial (#105)

The model and data URLs in the annotation-on-the-fly tutorial have a typo, and say `lateset` instead of `latest`. This fixes those URLs so they point to the correct place.

tutorials/annotation-on-the-fly.ipynb

@@ -17,8 +17,8 @@
     "When evaluating Bootleg using the annotator, Bootleg processes possible mentions in text with three environment flags: ``BOOTLEG_STRIP``, ``BOOTLEG_LOWER``, ``BOOTLEG_LANG_CODE``. The first sets the language to use for Spacy. The second is if the user wants to strip punctuation on mentions (set to False by default). The third is if the user wants to call ``.lower()`` (set to True by default). Set these with `os.environ`.\n",
     "\n",
     "You will need to download the following files for this notebook:\n",
-    "- Pretrained Bootleg uncased model and config [here](https://bootleg-data.s3-us-west-2.amazonaws.com/models/lateset/bootleg_uncased.tar.gz)\n",
-    "- Entity data [here](https://bootleg-data.s3-us-west-2.amazonaws.com/data/lateset/entity_db.tar.gz)\n",
+    "- Pretrained Bootleg uncased model and config [here](https://bootleg-data.s3-us-west-2.amazonaws.com/models/latest/bootleg_uncased.tar.gz)\n",
+    "- Entity data [here](https://bootleg-data.s3-us-west-2.amazonaws.com/data/latest/entity_db.tar.gz)\n",
     "\n",
     "For convenience, you can run the commands below (from the root directory of the repo) to download all the above files and unpack them to `models` and `data` directories. It will take several minutes to download all the files. \n",
     "\n",