fix: remove .all-contributorsrc from .prettierignore (#1815)

## PR Checklist

- [x] Addresses an existing open issue: fixes #1814
- [x] That issue was marked as [`status: accepting
prs`](https://github.com/JoshuaKGoldberg/create-typescript-app/issues?q=is%3Aopen+is%3Aissue+label%3A%22status%3A+accepting+prs%22)
- [x] Steps in
[CONTRIBUTING.md](https://github.com/JoshuaKGoldberg/create-typescript-app/blob/main/.github/CONTRIBUTING.md)
were taken

## Overview

Also fixes a `doc`/`docs` typo while I'm in the area.

💖