fix(pre-commit): Update package_dir

[calumy]

Fixes #682.

Can be tested by adding the following to your pre-commit config.

  - repo: https://github.com/calumy/typos
    rev: ec6998b
    hooks:
      - id: typos

I have tested this locally, and it appears to work.

[calumy]

After merging, tested successfully with:

  - repo: https://github.com/crate-ci/typos
    rev: 27eab33
    hooks:
      - id: typos