Update README.md and Test GitHub Copilot code review

[1998code]

This pull request includes updates to the README.md file in the ./Demo Xcode Project with SwiftUI. The changes primarily involve updating version numbers and improving the clarity of instructions.

Version updates:

• Updated tested versions for iOS, iPadOS, and macOS, and added visionOS to the compatibility table.

Instruction improvements:

• Enhanced the tutorial section to indicate the availability of the full tutorial on Medium or directly below in the README.
• Corrected the capitalization of "JSON" in the setup steps.
• Simplified the instruction for creating a new data.json file.
• Clarified the translation sample availability for version 3.9.7 or above.

[Copilot]

Copilot reviewed 1 out of 1 changed files in this pull request and generated 1 comment.

Comments suppressed due to low confidence (1)

README.md:75

• The word 'json' should be capitalized as 'JSON' for consistency.

5R | You can use remote JSON / firebase realtime database too. | Sample: https://testground-a937f-default-rtdb.firebaseio.com/0.json?print=pretty