[ci] Move exporting of variables to "variables" section

3 jobs for update-ci in 51 minutes and 47 seconds (queued for 4 seconds)
Status Job ID Name Coverage
  Build
passed #157648
docker
build_linux_36

00:29:37

passed #157649
macosx
build_macosx_36

00:23:41

 
  Browser Tests
passed #157650
docker
browser_test

00:22:06