Slightly rewording logo and website contributors and use https links

Author: xuhdev

index.html

@@ -252,7 +252,7 @@ <h3>Main Contributors</h3>
     <p>We have many awesome contributors contributing to the specification, core library, and plugins. For an up-to-date list, please see the <a href="https://github.com/editorconfig/editorconfig/wiki/Board-Member">Board Members page</a> and the contributor pages of the <a href="https://github.com/editorconfig/specification/graphs/contributors">specification</a>, core libraries, and plugins.</p>
 
     <p>
-    Most of of EditorConfig logos were drawn by <a href="http://squirrelmuffins.com">Kat On</a> and <a href="https://pittankopta.net/">Amon Keishima</a>. Website by <a href="http://treyhunner.com">Trey Hunner</a> and <a href="http://www.topbug.net">Hong Xu</a>.  Please attribute appropriately.
+    Most of of EditorConfig logos were drawn by <a href="https://squirrelmuffins.com">Kat On</a> and <a href="https://pittankopta.net/">Amon Keishima</a>. Website were mainly by <a href="https://treyhunner.com">Trey Hunner</a> and <a href="https://www.topbug.net">Hong Xu</a>.
     </p>
   </section>