[BUGFIX] Wrong usage-text for cli_dispatch

Correct usage text for cli_dispatch, use --refindex update
instead of -e

Resolves: #53399
Releases: 6.2, 6.1, 6.0
Change-Id: I6e571e8ba1cc139c7a4004800491637d5b3af6d7
Reviewed-on: https://review.typo3.org/25303
Tested-by: Jan Bartels
Reviewed-by: Jan Bartels
Reviewed-by: Wouter Wolters
Tested-by: Wouter Wolters