Updated recommended links for installation in readme

[abhaynikam]

• Updated the recommended url for installation in readme file. Found this issue when working on [DOCS] The new tabs on installation page doesn't work with link #9421.

Please have a look

Before submitting a pull request, please make sure the following is done:

1. Fork the repository and create your branch from master.
2. If you've added code that should be tested, add tests!
3. If you've changed APIs, update the documentation.
4. Ensure the test suite passes (npm test).
5. Make sure your code lints (npm run lint).
6. Format your code with prettier (npm run prettier).
7. Run the Flow typechecks (npm run flow).
8. If you added or removed any tests, run ./scripts/fiber/record-tests before submitting the pull request, and commit the resulting changes.
9. If you haven't already, complete the CLA.

[gaearon]

Thank you for spotting this!