docs: add “w-full h-full” to AspectRatio component example for proper display

[abrakazinga]

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🔗 Linked issue

No open issue, since it's a minor docs fix.

❓ Type of change

• [x] 📖 Documentation (updates to the documentation, readme or JSdoc annotations)
• [ ] 🐞 Bug fix (a non-breaking change that fixes an issue)
• [ ] 👌 Enhancement (improving an existing functionality like performance)
• [ ] ✨ New feature (a non-breaking change that adds functionality)
• [ ] 🧹 Chore (updates to the build process or auxiliary tools and libraries)
• [ ] ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

• Added w-full h-full to the img element in the AspectRatio component example.
• Without these classes, the image did not fill the container as expected when using the AspectRatio component.
• This ensures that the image will correctly scale within the given aspect ratio, filling the entire container.

📝 Checklist

• [ ] I have linked an issue or discussion.
• [x] I have updated the documentation accordingly.