fix(u5-search-item): encode markup (#12140)

Author: ndeshev

packages/fiori/src/SearchItem.ts

@@ -10,7 +10,8 @@ import event from "@ui5/webcomponents-base/dist/decorators/event-strict.js";
 import { SEARCH_ITEM_DELETE_BUTTON } from "./generated/i18n/i18n-defaults.js";
 import { i18n } from "@ui5/webcomponents-base/dist/decorators.js";
 import type I18nBundle from "@ui5/webcomponents-base/dist/i18nBundle.js";
-
+// @ts-expect-error
+import encodeXML from "@ui5/webcomponents-base/dist/sap/base/security/encodeXML.js";
 /**
  * @class
  *
@@ -136,7 +137,7 @@ class SearchItem extends ListItemBase {
 		super.onBeforeRendering();
 
 		// bold the matched text
-		this._markupText = this.highlightText ? generateHighlightedMarkup((this.text || ""), this.highlightText) : (this.text || "");
+		this._markupText = this.highlightText ? generateHighlightedMarkup((this.text || ""), this.highlightText) : encodeXML(this.text || "");
 	}
 
 	get _deleteButtonTooltip() {