HPCC-11611 Fix typos in ecl CLI docs

Signed-off-by: JamesDeFabia <James.Defabia@LexisNexis.com>
Merge pull request #6010 from JamesDeFabia/HPCC-11611_TyposinEcl_CLIDoc

HPCC-11611 Fix typos in ecl CLI docs

Reviewed-By: Anthony Fishbeck <anthony.fishbeck@lexisnexis.com>
Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>