Remove readme.md from distignore.

[mauteri]

Description of the Change

readme.md should not be in distignore.

Closes #

How to test the Change

Changelog Entry

Fixed - Bug fix

Credits

Props @mauteri @swissspidy

Checklist:

• I agree to follow this project's Code of Conduct.
• I have updated the documentation accordingly.
• I have added tests to cover my change.
• All new and existing tests pass.

[what-the-diff]

PR Summary

• Inclusion of README.md in Distribution
  The README.md file, which provides essential information about the project, is no longer disregarded when the project is packaged for distribution. This change ensures that people receiving the package will have all necessary information regarding the project right at their fingertips.