docs(recipe/magento2): fix typo in conccurent

[SimJoSt]

• [x] Docs added?
  • [x] Please, regenerate docs by running next command: $ php bin/docgen

Try #3779 again with changes in the correct file according to: https://github.com/deployphp/deployer/pull/3779#issuecomment-1946738715 :)