Maintenance: Removed empty code block

Author: ralf401

install/elasticsearch.rst

@@ -78,8 +78,6 @@ version 8, which also comes with some additional security features.
 
          $ /usr/share/elasticsearch/bin/elasticsearch-plugin install ingest-attachment
 
-      .. code-block:: sh
-
       .. code-block:: sh
 
          $ apt install apt-transport-https sudo wget curl gnupg