Follow-up fix for #2185

#2185 appears to cause a regression - https://github.com/rootlyhq/rootly-go/pull/41 is now receiving i.e.

```diff
 type Alert struct {
        // AlertFieldValuesAttributes Custom alert field values to create with the alert
-       AlertFieldValuesAttributes []struct {
+       AlertFieldValuesAttributes []*struct {
```

When using `prefers-skip-optional-pointer`