Add fediverse:creator meta tag (#920)

### Prerequisites

Put an `x` into the box(es) that apply:

- [ ] This pull request fixes a bug.
- [ x] This pull request adds a feature.
- [ ] This pull request introduces breaking change.

### Description

As announced in
https://blog.joinmastodon.org/2024/07/highlighting-journalism-on-mastodon/
Mastodon have added support for a new meta tag: fediverse:creator. This
change adds the fediverse:creator meta tag which can be used in blog
posts.

### Checklist

Put an `x` into the box(es) that apply:

#### General

- [ x] Describe what changes are being made
- [ x] Explain why and how the changes were necessary and implemented
respectively

#### Contributors

- [x ] Add yourself to `CONTRIBUTORS.md` if you aren't on it already

---------

Co-authored-by: Luiz F. A. de Prá <luizdepra@users.noreply.github.com>