Update README.md

Readme file in file listIn your repository's list of files, click README.md.
Above the file's content, click .
New content in fileIn the Code view, type some information about yourself.
File preview buttonAbove the new content, click Preview changes.
File preview viewReview the changes you made to the file. You'll see the new content in green.
Commit messageAt the bottom of the page, under "Commit changes," type a short, meaningful commit message that describes the change you made to the file.
Commit changes buttonClick Commit changes.