Fix domain's protocol!

Author: Anass Rach

_config.yml

@@ -1,7 +1,7 @@
 title: Java 21 OCP Flashcards
 description: A Structured collection of flashcards to help you prepare for the Oracle Certified Professional (OCP) Java 21 exam.
 remote_theme: just-the-docs/just-the-docs
-url: http://javaocpquiz.com
+url: https://javaocpquiz.com
 baseurl: ""
 nav_enabled: true
 back_to_top: true