[BUGFIX] Name of extension is not complete in rst documentation file

Resolves: #63840
Releases: master
Change-Id: I08c7106c88cdc02f6f54f92ba41bbd103f621f4a
Reviewed-on: http://review.typo3.org/35419
Reviewed-by: Mathias Schreiber <mathias.schreiber@wmdb.de>
Tested-by: Mathias Schreiber <mathias.schreiber@wmdb.de>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>