Right now we're linking http image from the https site ( https://elixirschool.com ).
This PR changes it to use the same protocol for image as ws used to access the page.
Use relative protocol link for license image
Thank you @brain-geek 👍
After these changes the license shield seems to be broken on GitHub. Are we going to do something with this?
Thanks for noting, @nscyclone !
I'm lookint into it.