Rename key of Branch Umap Feature to 'Branch UMAP outputs'

src/main/java/org/mastodon/mamut/feature/branch/dimensionalityreduction/umap/BranchUmapFeature.java

@@ -49,7 +49,7 @@
  */
 public class BranchUmapFeature extends AbstractUmapFeature< BranchSpot >
 {
-	public static final String KEY = "Branch Umap outputs";
+	public static final String KEY = "Branch UMAP outputs";
 
 	private final BranchSpotUmapFeatureSpec adaptedSpec;