fix(SECURITY): 🐛 🔒️ sanitize search result descriptions in old search module

The descriptions from TextExtracts, Description2, Wikibase, and ShortDescription
can contain unsanitized user input. This fixes a stored XSS vulnerability.

CVE-2025-53368

Author: SomeMWDev

resources/skins.citizen.search/templates/TypeaheadListItem.mustache

@@ -15,7 +15,7 @@
 		<div class="citizen-typeahead-list-item-text">
 			{{#text}}{{.}}{{/text}}
 			{{#title}}<div class="citizen-typeahead-list-item-title">{{{.}}}</div>{{/title}}
-			{{#description}}<div class="citizen-typeahead-list-item-description">{{{.}}}</div>{{/description}}
+			{{#description}}<div class="citizen-typeahead-list-item-description">{{.}}</div>{{/description}}
 		</div>
 		{{#html-end}}<div class="citizen-typeahead-list-item-end">{{{.}}}</div>{{/html-end}}
 	</a>