chore(ci): Rename labeler workflow (#40)

Make it easy to understand.

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**Issue:** close #

### Checklist

- [ ] This Pull Request introduces a new feature.
- [ ] This Pull Request fixes a bug.

### Description

I just wanted to set the name the same as my other repositories.

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<br />

- [x] I agree to follow the [Code of
Conduct](https://github.com/5ouma/mli/blob/main/.github/CODE_OF_CONDUCT.md).

Signed-off-by: Souma <[email protected]>