refactor(modal): extract iframe URL setting to reusable function

Created openUrlInQuizModal function to centralize and reuse the logic
for setting the iframe's src attribute and displaying the modal.
This change improves code maintainability by reducing redundancy.

script.js

@@ -128,6 +128,12 @@
         hideContent();
       }
 
+      function openUrlInQuizModal(href) {
+        $("#regular-modal-iframe").attr("src", href);
+
+        $("#regularModal").modal("show");
+      }
+
       async function openQuizModal(number) {
         let href = getFeedbackLinks()[number - 1];
 
@@ -148,9 +154,7 @@
 
         href = href + "&embed=1&modal=1";
 
-        $("#regular-modal-iframe").attr("src", href);
-
-        $("#regularModal").modal("show");
+        openUrlInQuizModal(href);
       }
 
       function closeQuizModal() {