update cypress version code example

Example 1: install cypress

npm install cypress or npm install cypress --save-dev // Make sure that you have already run npm init

./node_modules/.bin/cypress open  //to open cypress window, will take 30 secs

Example 2: open cypress window

./node_modules/.bin/cypress open   // just cypress open wont work

Example 3: run cypress

./node_modules/.bin/cypress open