fixed prvi subclass NAME

src/main/java/gov/usgs/earthquake/nshmp/gmm/AbrahamsonGulerce_2020.java

@@ -723,7 +723,7 @@ public abstract class AbrahamsonGulerce_2020 implements GroundMotionModel {
   }
 
   static final class PrviInterface extends Prvi {
-    static final String NAME = Alaska.NAME + " : " + INTERFACE;
+    static final String NAME = Prvi.NAME + " : " + INTERFACE;
 
     PrviInterface(Imt imt) {
       super(imt, AG_20_PRVI_INTERFACE);
@@ -731,7 +731,7 @@ public abstract class AbrahamsonGulerce_2020 implements GroundMotionModel {
   }
 
   static final class PrviSlab extends Prvi {
-    static final String NAME = Alaska.NAME + " : " + SLAB;
+    static final String NAME = Prvi.NAME + " : " + SLAB;
 
     PrviSlab(Imt imt) {
       super(imt, AG_20_PRVI_SLAB);