Improve UI of task list buttons

[mario-bermonti]

Description

This pull request includes changes to improve the UI of the task list buttons. The "Memoria de números al revés" button has been renamed to "Memoria de números inversos" and the "Memoria de números" button has been centered.

Related Issue

Closes #85

Type of Change

• 📚 Examples / docs / tutorials / dependencies update
• 🐞 Bug fix (non-breaking change that fixes an issue)
• 🔧 Maintenance (non-breaking change that improves code)
• 🥂 Improvement (non-breaking change which improves an existing feature)
• 🚀 New feature (non-breaking change which adds functionality)
• 💥 Breaking change (fix or feature that would cause existing functionality to change)
• 🔐 Security fix
• 🔐 Improvements to the CI workflow

Checklist

• I've read the project's code of conduct.
• I've read the contributing guide.
• I've written tests for all new methods and classes that I created.

This pull request includes changes to improve the UI of the task list buttons. The "Memoria de números al revés" button has been renamed to "Memoria de números inversos" and the "Memoria de números" button has been centered.