Revert "Fix AJAX JSON data (#2742)"

This reverts commit 340d373711, reversing
changes made to 1ed1efdc91.

Signed-off-by: DL6ER <dl6er@dl6er.de>

scripts/pi-hole/js/utils.js

@@ -315,12 +315,12 @@ function addFromQueryLog(domain, list) {
       url: "/api/domains/" + list + "/exact",
       method: "post",
       dataType: "json",
-      data: {
+      data: JSON.stringify({
         domain: domain,
         comment: "Added from Query Log",
         type: list,
         kind: "exact",
-      },
+      }),
       success: function (response) {
         alProcessing.hide();
         if ("domains" in response && response.domains.length > 0) {