Update README.md

[umairx97]

Summary

Explain the motivation for making this change: here are some points to help you:

• What issues does the pull request solve? Please tag them so that they will get automatically closed once the PR is merged
  This PR solves a typo in README.md
• What is the feature? (if applicable)
• How did you implement the solution?
• What areas of the library does it impact?

Test Plan

Demonstrate the code is solid. Example: The exact commands you ran and their output, screenshots / videos if the pull request changes UI.

What's required for testing (prerequisites)?

What are the steps to reproduce (after prerequisites)?

Compatibility

OS	Implemented
iOS	✅
Android	✅

Checklist

• I have tested this on a device and a simulator
• I added documentation in README.md
• I updated the typed files (typescript)
• I added a test for the API in the __tests__ folder