Update README.md

Updating to note MODIS availability to 2022-01-01

README.md

@@ -52,6 +52,8 @@ pip install . -r requirements.txt
 
 To use the Google Earth Engine API, you must create and authenticate a Google Earth Engine account. Information on the Earth Engine Python API can be found [here](https://developers.google.com/earth-engine/tutorials/community/intro-to-python-api). 
 
+It is recommended to use the command `git pull` to pull the newest version of airPy changes that have been made.
+
 ## Creating ML-ready features from GEE data with ``airPy``
 #### Running the airPy pipeline
 The airPy pipeline job is fully specified by a configuration dictionary generated by the `GenerateConfig` class. To create a new configuration and run the pipeline, inside of the ```airpy``` directory, use the command
@@ -60,7 +62,7 @@ python run_airpy.py
 ```
 and specify the various parameters of the data of interest. The available configurable parameters are:
 * `--gee_data`: The name of the GEE dataset of interest, either modis, pop, fire, or nightlight.
-    *    `modis`: MCD12Q1.061 MODIS Land Cover Type Yearly Global 500m, available 2001-01-01 to 2021-01-01
+    *    `modis`: MCD12Q1.061 MODIS Land Cover Type Yearly Global 500m, available 2001-01-01 to 2022-01-01
     *    `pop`: GPWv411: Population Density (Gridded Population of the World Version 4.11), available 2000-01-01 to 2020-01-01
     *    `fire`: FireCCI51: MODIS Fire_cci Burned Area Pixel Product, Version 5.1, available 2001-01-01 to 2020-12-01
     *    `nightlight`: VIIRS Nighttime Day/Night Band Composites Version 1, available 2012-04-01 to 2023-01-01