chore(macros): mark DOMAttributeMethods as deprecated (#10529)

Author: bsmth

Diff for: kumascript/macros/DOMAttributeMethods.ejs

@@ -1,4 +1,7 @@
 <%
+// Removed from mdn/content in https://github.com/mdn/content/pull/32268
+mdn.deprecated();
+
 var tableTitle = 'DOM methods dealing with element\'s attributes:';
 var tableHead1 = 'Not namespace-aware, most commonly used methods';
 var tableHead2 = 'Namespace-aware variants (DOM Level 2)';