Name test case more descriptively

MOE_MIGRATED_REVID=163530301

core/src/test/java/com/google/errorprone/bugpatterns/testdata/ThrowIfUncheckedKnownCheckedTestNegativeCases.java

@@ -61,7 +61,7 @@ <E extends Exception> void genericMaybeUnchecked(E e) {
     throwIfUnchecked(e);
   }
 
-  <E extends T, T extends Exception> void genericHellhole(E e) {
+  <E extends T, T extends Exception> void genericUpperBoundDifferentFromErasure(E e) {
     throwIfUnchecked(e);
   }