[Bug]: Missing migration documentation

[DDavidPrime]

Desctibe the bug

Upon researching how to migrate from an older version (2.0.0) to the latest one, I wanted to check out the migration example on how to do that. Upon opening the link at the bottom of the migration section, it redirected me to a 404 - Not found page instead of the migration example.

Reproduction steps

1. Open theme_tailor on pub.dev and find the migration section (https://pub.dev/packages/theme_tailor#migration-from-tailor-to-tailormixin).
2. Click on the link saying To see an example of how to migrate, head out to [example: migration_example](https://github.com/Iteo/theme_tailor/blob/main/packages/theme_tailor/example/lib/migration_from_tailor_to_tailor_mixin.dart)

Expected behaviour

A page to proper migration documentation should be opened.

Dart version

Irrelevant

Package version

2.0.0

What platform are you seeing the problem on?

iOS, Android, Web, Windows, macOS, Linux

Relevant log output

None

[Falynsky]

Migration file will be restored soon to the main, thanks for noticing 😁