chore: add info about translations table to getting started (#3719)

Co-authored-by: Joakim Bjerknes <joakbjerk@gmail.com>

packages/dnb-design-system-portal/src/docs/uilib/extensions/forms/getting-started.mdx

@@ -432,6 +432,8 @@ You can customize the translations in a form by using the `translations` propert
 
 Alternatively, you can use the global Eufemia [Provider](/uilib/usage/customisation/localization/) (example further down).
 
+You can find all available strings/keys in the properties tab of each field component. You can have a look at the [PhoneNumber field](!/uilib/extensions/forms/feature-fields/PhoneNumber/properties/#translations).
+
 ```tsx
 import { Form, Field } from '@dnb/eufemia/extensions/forms'