[DOCS] broken link on README.md

Documentation Type

Broken links

Documentation Location

https://github.com/anthropics/claude-code/blob/main/README.md

Section/Topic

README "Learn more in the official documentation" link

Current Documentation

"Learn more in the official documentation" link is broken

What's Wrong or Missing?

The current document link in the main README is broken. I think it should point to https://code.claude.com/docs/en/overview instead

Suggested Improvement

Please fix the link

Impact

Medium - Makes feature difficult to understand

Additional Context

_No response_