Correct role mismatch in examples of "button has accessible name" [97a4e1]

[Jym77]

Removed an incorrect passed example (the element has no implicit role)
Added an inapplicable example (for an element which does not have an implicit role of button).

Closes issue(s):

• closes Summary element has no implicit role (97a4e1) #1169

Need for Final Call:
This will require a 1 week Final Call (updating examples).

---

Pull Request Etiquette

When creating PR:

• Make sure you're requesting to pull a branch (right side) to the develop branch (left side).

After creating PR:

• Add yourself (and co-authors) as "Assignees" for PR.
• Add label to indicate if it's a Rule, Definition or Chore.
• Close the issue that the PR resolves (and make sure the issue is referenced in the top of this comment)
• Optionally request feedback from anyone in particular by assigning them as "Reviewers".

How to Review And Approve

• Go to the “Files changed” tab
• Here you will have the option to leave comments on different lines.
• Once the review is completed, find the “Review changes” button in the top right, select “Approve” (if you are really confident in the rule) or "Request changes" and click “Submit review”.
• Make sure to also review the proposed Final Call period. In case of disagreement, the longer period wins.

[Jym77]

Final Call ending on March 18, 2020.

[Jym77]

Final Call has ended. Merging.