chore: Add comment to explain the reason for ignoring validation

frappe/public/js/frappe/ui/filters/filter_list.js

@@ -63,6 +63,8 @@ frappe.ui.FilterGroup = class {
 	}
 
 	validate_args(doctype, fieldname) {
+		// Tags attached to the document are maintained seperately in Tag Link
+		// and is not the part of doctype meta therefore tag fieldname validation is ignored.
 		if (doctype === "Tag Link" && fieldname === "tag") {
 			return true;
 		}