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Hyphenate compound adjective

Author: AnnaMHuff

articles/open-datasets/samples.md

@@ -23,7 +23,7 @@ The example Jupyter notebooks for Azure Open Datasets explain how to load open d
 ## Join demo data with NOAA ISD data 
 |Notebook        | Description                                    |
 |----------------|------------------------------------------------|
-|[Join demo data with weather data - Pandas](https://github.com/Azure/OpenDatasetsNotebooks/blob/master/tutorials/data-join/02-weather-join-in-pandas.ipynb) | Join a one month demo dataset of sensor locations with weather readings in a Pandas dataframe.  |
+|[Join demo data with weather data - Pandas](https://github.com/Azure/OpenDatasetsNotebooks/blob/master/tutorials/data-join/02-weather-join-in-pandas.ipynb) | Join a one-month demo dataset of sensor locations with weather readings in a Pandas dataframe.  |
 |[Join demo data with weather data – Spark](https://github.com/Azure/OpenDatasetsNotebooks/blob/master/tutorials/data-join/01-weather-join-in-spark.ipynb) | Join a demo dataset of sensor locations with weather readings in a Spark dataframe. |
 
 ## Join NYC taxi data with NOAA ISD data