Update Accessibility Pattern Index to cover the difference between the usage of role, state and property ARIA labels

### Overview
We need to update the accessibility patterns index page to explain the different types of ARIA labels.

### Action Items
- [ ]

### Resources/Instructions
- https://github.com/hackforla/accessibility/blob/main/docs/getting-started/accessibility-patterns-index/index.md

Open docs/getting-started/accessibility-patterns-index/index.md and review the existing accessibility patterns index. Add a clear explanation of how ARIA roles, states, and properties differ in usage, using the issue’s requested scope as the guide. Done means the index covers these distinctions clearly for its readers.

Written by the indexing model from the issue text.