fix path to group

src/main/java/gov/usgs/earthquake/nshmp/netcdf/NshmGroup.java

@@ -6,7 +6,7 @@ public enum NshmGroup {
 
   CONUS_2018A(
       "2018 Conterminous U.S. NSHM",
-      "/NSHM_2018A/CONUS",
+      "/CONUS/2018/v1.1",
       2);
 
   private final String display;