fix(toggl): forgot to import Description field

notebooks/toggl-to-harvest.ipynb

@@ -55,6 +55,7 @@
         "    \"Start date\",\n",
         "    \"Start time\",\n",
         "    \"Duration\",\n",
+        "    \"Description\"\n",
         "]\n",
         "# read CSV file, parsing dates and times\n",
         "source = pd.read_csv(DATA_SOURCE, dtype=dtypes, usecols=cols, parse_dates=[\"Start date\"], cache_dates=True)\n",