message: docs: README - use correctly encoded link for npm badge
  closes an old PR that was approved but to old/difficult to merge
diff: [![Join the chat at https://gitter.im/angular/angular](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/angular/angular?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
  [![Issue Stats](http://issuestats.com/github/angular/angular/badge/pr?style=flat)](http://issuestats.com/github/angular/angular)
  [![Issue Stats](http://issuestats.com/github/angular/angular/badge/issue?style=flat)](http://issuestats.com/github/angular/angular)
  -[![npm version](https://badge.fury.io/js/%40angular%2Fcore.svg)](https://badge.fury.io/js/%40angular%2Fcore)
  +[![npm version](https://badge.fury.io/js/%40angular%2Fcore.svg)](https://www.npmjs.com/@angular/core)
  +)
  [![Sauce Test Status](https://saucelabs.com/browser-matrix/angular2-ci.svg)](https://saucelabs.com/u/angular2-ci)
  *Safari (7+), iOS (7+), Edge (14) and IE mobile (11) are tested on [BrowserStack][browserstack].*
  