HPCC-12453 Docs: ecl getname --limit=<limit>

Signed-off-by: Jim DeFabia <jamesdefabia@lexisnexis.com>
Merge pull request #6572 from JamesDeFabia/12453DOCS_Add_limit_to_ecl_getname

HPCC-12453 Docs: ecl getname --limit=<limit>

Reviewed-By: Attila Vamos <attila.vamos@lexisnexis.com>
Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>