fix: correct modal accessibility aria-labelledby reference

[wo-o29]

📝 Key Changes

Fixed modal accessibility documentation issue where the example screen reader output showed incorrect text that doesn't exist in the code example.

Problem Clarification:

• In the code example, aria-labelledby="modal-title" references an <h3 id="modal-title"> element containing the text "다음에 다시 시도해 주세요"
• The text "제목은 한 줄로 써주세요" mentioned in the screen reader example does not exist anywhere in the provided code
• This created confusion about the expected screen reader output

Changes made:

• Corrected the screen reader output example to reflect the actual text content in the code
• Clarified that the expected output should be "다음에 다시 시도해 주세요, 대화상자" based on the real modal title text
• Removed references to non-existent placeholder text in the accessibility example

🖼️ Before and After Comparison

Before	After

[vercel]

@wo-o29 is attempting to deploy a commit to the Toss Team on Vercel.

A member of the Team first needs to authorize it.

[kss2002]

• wo-o29님이 찾아내신 모달 관련 링크 첨부

https://frontend-fundamentals.com/a11y/ui-foundation/modal.html

[wo-o29]

• wo-o29님이 찾아내신 모달 관련 링크 첨부

https://frontend-fundamentals.com/a11y/ui-foundation/modal.html

감사합니다!