ISTWCMS-7275: Update label for 'publication_reference' to 'References'

Renames the label for 'publication_reference' to improve consistency and clarity in block labels. This change ensures a more concise and user-friendly terminology. It does not affect any functionality or data logic.

src/Service/UwBlockService.php

@@ -749,7 +749,7 @@ class UwBlockService {
       'opportunity' => $this->t('Opportunities'),
       'profile' => $this->t('Profiles'),
       'project' => $this->t('Projects'),
-      'publication_reference' => $this->t('Publication references'),
+      'publication_reference' => $this->t('References'),
       'service' => $this->t('Services'),
     ];
   }