Update readme

Author: VeckoTheGecko

README.md

@@ -24,4 +24,6 @@ just move this to the `data` directory.
 
 3. Update [parcels/tools/exampledata_utils.py](https://github.com/OceanParcels/parcels/blob/main/parcels/tools/exampledata_utils.py) accordingly to include your new dataset.
 
+---
+
 Git LFS isn't used for this repo as the datasets are small, and we are using the GitHub `https://raw.githubusercontent.com/` to get the data.