fix: Add missing typing

[jimishshah]

Summary

Add missing type in transformEntryForLocale function

Description

Motivation and Context

This pr #1212 was merged and released but it missed to add the types in index.d.ts file, this gives following typescript error in client code.

Type '(from: any, currentLocale: any, { id: entryId }: { id: any; }) => Promise<any>' is not assignable to type '(fromFields: ContentFields, currentLocale: string) => any'.
  Target signature provides too few arguments. Expected 3 or more, but got 2.ts(2322)

Todos

• Implemented feature
• Feature with pending implementation

Screenshots (if appropriate):

[marcolink]

@jimishshah thanks for your contribution 🎉

Will merge after CI run passed successfully :)

[contentful-automation]

🎉 This PR is included in version 4.13.1 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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