Fix ARIA controls title

[danahertzberg]

Problem/Motivation

When scanning the site with Dubbot, this Level A issue arose as seen on https://commencement.arizona.edu/convocations

Describe the bug

In accordions, the aria-controls="" is not referencing the correct ID of the accordion body.

To Reproduce

1. Add an accordion with title and body
2. Inspect to see aria-controls="az-accordion-aria-controls--2" on the title's button tag
3. Inspect to see id="az-accordion--2" on the accordion body div

Proposed resolution

Change the ID associated with accordion titles.

Example: Change aria-controls="az-accordion-aria-controls--2" to aria-controls="az-accordion--2"

https:/az-digital/az_quickstart/blob/main/modules/custom/az_accordion/src/Plugin/Field/FieldFormatter/AZAccordionDefaultFormatter.php#L137

Expected behavior

aria-controls and id should match

Additional context

https://app.dubbot.com/sites/5dc32d02482faf0915d31627/pages/65f43beab48ef57db1f27a1d?tab=accessibility&issueId=aria-valid-attr-value

https://developer.mozilla.org/en-US/docs/Web/Accessibility/ARIA/Attributes/aria-controls