Fix image_src link

The link in the image_src link (used for previews on Social Media such as Facebook) was still using the old route. This changes it to use the new route.

Signed-off-by: Lukas Reschke <lukas@statuscode.ch>

apps/files_sharing/lib/Controller/ShareController.php

@@ -370,7 +370,7 @@ public function showShare($token, $path = '') {
 		$shareTmpl['previewMaxY'] = $this->config->getSystemValue('preview_max_y', 1024);
 		$shareTmpl['disclaimer'] = $this->config->getAppValue('core', 'shareapi_public_link_disclaimertext', null);
 		if ($shareTmpl['previewSupported']) {
-			$shareTmpl['previewImage'] = $this->urlGenerator->linkToRouteAbsolute( 'core_ajax_public_preview',
+			$shareTmpl['previewImage'] = $this->urlGenerator->linkToRouteAbsolute( 'core.Preview.getPreview',
 				['x' => 200, 'y' => 200, 'file' => $shareTmpl['directory_path'], 't' => $shareTmpl['dirToken']]);
 		} else {
 			$shareTmpl['previewImage'] = $this->urlGenerator->getAbsoluteURL($this->urlGenerator->imagePath('core', 'favicon-fb.png'));