Fix Accessibility issue on the required role's attributes for Vartheme BS5

Problem/Motivation

Some ARIA roles have required attributes that describe the state of the element to screen readers.
For example, the heading role.
[role]s do not have all required [aria-*] attributes

Steps to reproduce

Run the Lighthouse and check the accessibility highlights.

Proposed resolution

By adding the required attributes for the heading roles according to role definitions from the WAI-ARIA specification

Remaining tasks

• ✅ File an issue about this project
• ✅ Addition/Change/Update/Fix to this project
• ✅ Testing to ensure no regression
• ➖ Automated unit/functional testing coverage
• ➖ Developer Documentation support on feature change/addition
• ➖ User Guide Documentation support on feature change/addition
• ✅ Accessibility and Readability
• ✅ Code review from 1 Varbase core team member
• ✅ Full testing and approval
• ✅ Credit contributors
• ✅ Review with the product owner
• ✅ Update Release Notes and Update Helper on new feature change/addition
• ✅ Release varbase-10.0.0-alpha1 →
  , vartheme_bs5-1.0.0-rc2 →

Varbase update type

• ✅ No Update
• ➖ Optional Update
• ➖ Forced Update
• ➖ Forced Update if Unchanged

User interface changes

• N/A

API changes

• N/A

Data model changes

• N/A

Release notes snippet

• Issue #3275692 → by Mohammad Fayoumi → : Fixed Accessibility issue on the required role's attributes for Vartheme BS5