Update README-zh.md

[oldj]

Types of Changes

What types of changes does your PR introduce? Put an x in all boxes that apply

• New addition to list
• Fixing bug in existing item in list
• Removing item from list
• Changing structure (organization) of list

Proposed Changes

Added screenshot app Tuji. This is a powerful and easy-to-use screenshot application. You can use it to take screenshots and add annotations, watermarks, borders, beautiful backgrounds, etc. to the screenshots as needed.

PR Checklist

Put an x in the boxes once you've completed each step. You can also fill these out after creating the PR. If you're unsure about any of them, don't hesitate to ask. We're here to help! This is simply a reminder of what we are going to look for before merging your code.

• I have read the CONTRIBUTING guide
• I have explained why this PR is important
• I have added necessary documentation (if appropriate)