Correct a small typo

This commit changes a tiny typo in the Eager Execution notebook.

samples/core/get_started/eager.ipynb

@@ -766,7 +766,7 @@
         "\n",
         "test_dataset = tf.data.TextLineDataset(test_fp)\n",
         "test_dataset = test_dataset.skip(1)             # skip header row\n",
-        "test_dataset = test_dataset.map(parse_csv)      # parse each row with the funcition created earlier\n",
+        "test_dataset = test_dataset.map(parse_csv)      # parse each row with the function created earlier\n",
         "test_dataset = test_dataset.shuffle(1000)       # randomize\n",
         "test_dataset = test_dataset.batch(32)           # use the same batch size as the training set"
       ],