Revert "feat: update contact link"

This reverts commit f0fcd2d6.

index.html

@@ -293,11 +293,7 @@
 
       <div class="contact">
         <span>Il vous reste des questions ?</span>
-        <a
-          class="footerLink"
-          href="https://support.grandlyon.com/ecolyo/"
-          target="_blank"
-        >
+        <a class="footerLink" href="mailto:ecolyo@grandlyon.com">
           Contactez-nous</a
         >
       </div>