update expected ResourceGroupName count in test function

apstra/utils/resource_group_test.go

@@ -12,7 +12,7 @@ func TestAllResourceGroupNameStrings(t *testing.T) {
 			t.Fatal("AllResourceGroupNameStrings() returned an empty string")
 		}
 	}
-	expectedRgnCount := 20
+	expectedRgnCount := 31
 	if len(argns) != expectedRgnCount {
 		t.Fatalf("expected %d resource group names, got %d", expectedRgnCount, len(argns))
 	}