Update README.md

Updated acronym for HLS

README.md

@@ -10,7 +10,7 @@ license: apache-2.0
 
 NASA and IBM have teamed up to create an AI Foundation Model for Earth 
 Observations, using large-scale satellite and remote sensing data, including 
-the Harmonized Landsat Sentinel2 ([HLS2](https://hls.gsfc.nasa.gov/)) data. By embracing the principles of 
+the Harmonized Landsat Sentinel-2 ([HLS](https://hls.gsfc.nasa.gov/)) data. By embracing the principles of 
 open AI and open science, both organizations are actively contributing to the 
 global mission of promoting knowledge sharing and accelerating innovations in 
 addressing critical environmental challenges. With Hugging Face's platform,