[BUG] There is character corruption/garbled text in ADMINISTRATOR_ja-JP.md

[yoshiehm]

🚨 Please Note 🚨

To ensure efficient investigation of the issue, please fill out the fields below with as much detail as possible. Reports that do not follow this template may be closed without notification. We appreciate your cooperation.

🐞Describe the bug

There is character corruption/garbled text in ADMINISTRATOR_ja-JP.md

🔄 To Reproduce

Steps to reproduce the behavior:

1. Go to
   https://github.com/aws-samples/bedrock-chat/blob/v3/docs/ADMINISTRATOR_ja-JP.md#%E5%85%AC%E3%83%9C%E3%83%83%E3%83%88%E3%83%83%E3%83%88%E3%83%83%E3%83%88%E3%81%A8%E3%81%97%E3%81%A6%E6%8C%87%E3%83%9E%E3%83%BC%E3%82%AF
2. See error## 📷 Screenshots

🔎 Logs for Chat Issues

• /aws/lambda/BedrockChatStack-BackendApiHandlerXXXX
• /aws/lambda/BedrockChatStack-WebSocketHandlerXXXX

📝 Additional context

Add any other context about the problem here.