feat(Accordion): pulled in Penta updates by thatblindgeye · Pull Request #9876 · patternfly/patternfly-react

What: Closes #9851

Confirmed that using the latest alpha locally fixes the border color mismatch between this PR and the core v6 staging.

If we want to wait until #9877 gets merged and pulled into the v6 branch, I can update the new example + tests that were added, otherwise the updates shouldn't be too difficult if done during the merge of main into v6.

Additional issues: