more updates to water mask description

src/hyp3_isce2/metadata/templates/insar_burst/insar_burst_base.md.txt.j2

@@ -225,8 +225,9 @@ https://spacedata.copernicus.eu/collections/copernicus-digital-elevation-model.
 
 The water mask identifies coastal waters and most inland waterbodies. These areas are assigned a pixel value of 0.
 All remaining pixels (land, islands in large lakes, very small inland waterbodies, and landfast Antarctic ice)
-have a value of 1. Areas between 85 and 90 degrees latitude (both north and south) are also given a value of 1.
-The water mask is stored as an 8-bit unsigned integer GeoTIFF file and is always included in the product package.
+have a value of 1. All areas between 85 and 90 degrees north latitude are assigned a value of 0, and all areas
+between 85 and 90 degrees south latitude are assigned a value of 1. The water mask is stored as an 8-bit unsigned
+integer GeoTIFF file and is always included in the product package.
 
 Users can choose to apply the water mask before phase unwrapping. This mitigates potential errors in the unwrapping
 process caused by invalid coherence over water bodies. The water mask will also return nodata values in areas of water