fix: update text domain

[laurelfulford]

All Submissions:

• [x] Have you followed the Newspack Contributing guideline?
• [x] Does your code follow the WordPress' coding standards and VIP Go coding standards?
• [x] Have you checked to ensure there aren't other open Pull Requests for the same update/change?

Changes proposed in this Pull Request:

This PR fixes some text domains that are needed for translation next week.

The required strings are:

• Confirm to delete your account permanently.
• This is how your name is displayed publicly.
• Caution, this action is irreversible!
• Your account has been deleted.
• We're sorry to see you go. But hope you'll continue to follow our coverage.
• Return to home page

... but a couple more got fixed in the same files.

See 1200550061930446-as-1207745779254897

How to test the changes in this Pull Request:

1. Confirm that the text domains are correct (newspack-plugin) for all of the strings listed above in the Newspack Plugin.
2. Confirm that they appear in the updated POT file.

Other information:

• [x] Have you added an explanation of what your changes do and why you'd like us to include them?
• [ ] Have you written new tests for your changes, as applicable?
• [ ] Have you successfully ran tests with your changes locally?

[laurelfulford]

Thanks @adekbadek! 🙌

[matticbot]

:tada: This PR is included in version 4.4.1 :tada:

The release is available on GitHub release

Your semantic-release bot :package::rocket:

[matticbot]

:tada: This PR is included in version 4.5.0-alpha.2 :tada:

The release is available on GitHub release

Your semantic-release bot :package::rocket: