Update README.md

README.md

@@ -14,7 +14,7 @@ Can be used to estimate the quality of a segmentation for evaluation purposes or
 > This package expects images in atlas space and segmentation labels in brats style, i.e.
 > - `label 1` is the necrotic and non-enhancing tumor core
 > - `label 2` is the peritumoral edema
-> - `label 3` is the GD-enhancing tumor (used to be label 4 in older datasets, both are supported)
+> - `label 3` is the GD-enhancing tumor (used to be `label 4` in older data, both are supported)
 
 ## Installation