fix: open link in new tab/window

public/typo3conf/ext/ep_theme/Resources/Private/Templates/AjaxTeaserPopup/Concept.html

@@ -29,7 +29,7 @@
                                 {concept.name}
                             </h3>
                             {concept.popupText -> f:format.html()}
-                            <a href="{targetUrl}" class="button bg-button">
+                            <a href="{targetUrl}" target="_blank" class="button bg-button">
                                 {concept.popupButtonLabel}
                             </a>
                         </div>