fix: Convert http to https

[MichaelCurrin]

This is a fix to adjust fonts from http to https

HTTP

When visiting the site here, this not an issue.

http://cooervo.github.io/Algorithms-DataStructures-BigONotation/

But that is also only HTTP.

HTTPS

You can also visit HTTPS - this will give better ranking on search engines and adds trust for visitors esp if any data was shared.

https://cooervo.github.io/Algorithms-DataStructures-BigONotation/

The fonts don't load though.

Check the JS log and you'll see an error

Blocked loading mixed active content “http://fonts.googleapis.com/css?family=Open+Sans:800|Titillium+Web:400,600,700,900”

Mixed is because the external URL is http but the current page is https.

So I made them all https.