fix(translations): adds et to import file (#10823)

### What?
Error thrown when initiating the Estonian language (`et`) from
`@payloadcms/translations`
<img width="896" alt="Screenshot 2025-01-27 at 3 17 49 PM"
src="https://github.com/user-attachments/assets/27603c75-d713-4f11-b141-dc293d51800c"
/>

### How?
`et` needed to be added to `importDateFNSLocale`. Tested after this
change and the error is no longer present.

Fixes #10817

Author: jessrynkar

packages/translations/src/importDateFNSLocale.ts

@@ -39,6 +39,10 @@ export const importDateFNSLocale = async (locale: string): Promise<Locale> => {
     case 'es':
       result = (await import('date-fns/locale/es')).es
 
+      break
+    case 'et':
+      result = (await import('date-fns/locale/et')).et
+
       break
     case 'fa-IR':
       result = (await import('date-fns/locale/fa-IR')).faIR