Fix website deploys on master
Fix website deploys on master

Summary:
Use newer CircleCI 2.0 environment variable names, being consistent with CircleCI config.
Closes https://github.com/facebook/react-native/pull/16778

Differential Revision: D6288751

Pulled By: hramos

fbshipit-source-id: 079ffaaea1ed3b715a12b07ed7738750672eee4e

exponent/react-native,pandiaraj44/react-native,jevakallio/react-native,arthuralee/react-native,hammerandchisel/react-native,myntra/react-native,hammerandchisel/react-native,hoastoolshop/react-native,exponentjs/react-native,jevakallio/react-native,ptmt/react-native-macos,javache/react-native,rickbeerendonk/react-native,facebook/react-native,jevakallio/react-native,rickbeerendonk/react-native,hoangpham95/react-native,janicduplessis/react-native,ptmt/react-native-macos,myntra/react-native,rickbeerendonk/react-native,exponentjs/react-native,exponentjs/react-native,exponentjs/react-native,facebook/react-native,hoangpham95/react-native,exponent/react-native,hoastoolshop/react-native,javache/react-native,hoangpham95/react-native,facebook/react-native,pandiaraj44/react-native,rickbeerendonk/react-native,kesha-antonov/react-native,exponent/react-native,javache/react-native,pandiaraj44/react-native,dikaiosune/react-native,hammerandchisel/react-native,javache/react-native,pandiaraj44/react-native,jevakallio/react-native,janicduplessis/react-native,arthuralee/react-native,facebook/react-native,jevakallio/react-native,ptmt/react-native-macos,myntra/react-native,jevakallio/react-native,hoastoolshop/react-native,facebook/react-native,myntra/react-native,hammerandchisel/react-native,hoangpham95/react-native,ptmt/react-native-macos,pandiaraj44/react-native,dikaiosune/react-native,pandiaraj44/react-native,exponentjs/react-native,kesha-antonov/react-native,jevakallio/react-native,rickbeerendonk/react-native,Bhullnatik/react-native,rickbeerendonk/react-native,jevakallio/react-native,myntra/react-native,ptmt/react-native-macos,hoastoolshop/react-native,dikaiosune/react-native,javache/react-native,ptmt/react-native-macos,Bhullnatik/react-native,hoastoolshop/react-native,hammerandchisel/react-native,rickbeerendonk/react-native,jevakallio/react-native,javache/react-native,janicduplessis/react-native,Bhullnatik/react-native,hammerandchisel/react-native,hoangpham95/react-native,exponentjs/react-native,javache/react-native,arthuralee/react-native,kesha-antonov/react-native,exponentjs/react-native,exponent/react-native,kesha-antonov/react-native,Bhullnatik/react-native,dikaiosune/react-native,janicduplessis/react-native,facebook/react-native,myntra/react-native,janicduplessis/react-native,kesha-antonov/react-native,exponent/react-native,rickbeerendonk/react-native,ptmt/react-native-macos,hammerandchisel/react-native,hoangpham95/react-native,kesha-antonov/react-native,pandiaraj44/react-native,myntra/react-native,myntra/react-native,facebook/react-native,exponentjs/react-native,kesha-antonov/react-native,dikaiosune/react-native,dikaiosune/react-native,javache/react-native,facebook/react-native,ptmt/react-native-macos,dikaiosune/react-native,dikaiosune/react-native,hoastoolshop/react-native,arthuralee/react-native,Bhullnatik/react-native,arthuralee/react-native,hoastoolshop/react-native,kesha-antonov/react-native,javache/react-native,exponent/react-native,Bhullnatik/react-native,hoastoolshop/react-native,hammerandchisel/react-native,hoangpham95/react-native,rickbeerendonk/react-native,janicduplessis/react-native,facebook/react-native,myntra/react-native,Bhullnatik/react-native,Bhullnatik/react-native,kesha-antonov/react-native,hoangpham95/react-native,exponent/react-native,janicduplessis/react-native,janicduplessis/react-native,exponent/react-native,pandiaraj44/react-native